diff --git a/package-lock.json b/package-lock.json
index 6a62ee9e..32cc7a6d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@daostack/arc",
-  "version": "0.0.0-alpha.43",
+  "version": "0.0.0-alpha.44",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -20,10 +20,10 @@
       "dev": true,
       "requires": {
         "@babel/types": "7.0.0-beta.42",
-        "jsesc": "2.5.1",
-        "lodash": "4.17.5",
-        "source-map": "0.5.7",
-        "trim-right": "1.0.1"
+        "jsesc": "^2.5.1",
+        "lodash": "^4.2.0",
+        "source-map": "^0.5.0",
+        "trim-right": "^1.0.1"
       },
       "dependencies": {
         "jsesc": {
@@ -69,9 +69,9 @@
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       "dev": true,
       "requires": {
-        "chalk": "2.3.2",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.0"
       }
     },
     "@babel/template": {
@@ -83,7 +83,7 @@
         "@babel/code-frame": "7.0.0-beta.42",
         "@babel/types": "7.0.0-beta.42",
         "babylon": "7.0.0-beta.42",
-        "lodash": "4.17.5"
+        "lodash": "^4.2.0"
       },
       "dependencies": {
         "babylon": {
@@ -106,10 +106,10 @@
         "@babel/helper-split-export-declaration": "7.0.0-beta.42",
         "@babel/types": "7.0.0-beta.42",
         "babylon": "7.0.0-beta.42",
-        "debug": "3.1.0",
-        "globals": "11.3.0",
-        "invariant": "2.2.4",
-        "lodash": "4.17.5"
+        "debug": "^3.1.0",
+        "globals": "^11.1.0",
+        "invariant": "^2.2.0",
+        "lodash": "^4.2.0"
       },
       "dependencies": {
         "babylon": {
@@ -141,9 +141,9 @@
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       "dev": true,
       "requires": {
-        "esutils": "2.0.2",
-        "lodash": "4.17.5",
-        "to-fast-properties": "2.0.0"
+        "esutils": "^2.0.2",
+        "lodash": "^4.2.0",
+        "to-fast-properties": "^2.0.0"
       },
       "dependencies": {
         "to-fast-properties": {
@@ -172,14 +172,14 @@
       "integrity": "sha1-JP/ukmQijhw+3WH9MWLWNYeVSTM=",
       "dev": true,
       "requires": {
-        "@soldoc/markdown": "0.1.0",
-        "chalk": "2.3.2",
-        "deep-assign": "2.0.0",
-        "fs-extra": "5.0.0",
-        "shelljs": "0.8.1",
-        "solc": "0.4.24",
-        "valid-url": "1.0.9",
-        "yargs": "11.0.0"
+        "@soldoc/markdown": "^0.1.0",
+        "chalk": "^2.3.1",
+        "deep-assign": "^2.0.0",
+        "fs-extra": "^5.0.0",
+        "shelljs": "^0.8.1",
+        "solc": "^0.4.19",
+        "valid-url": "^1.0.9",
+        "yargs": "^11.0.0"
       }
     },
     "@types/babel-types": {
@@ -194,7 +194,7 @@
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       "dev": true,
       "requires": {
-        "@types/babel-types": "7.0.1"
+        "@types/babel-types": "*"
       }
     },
     "accepts": {
@@ -203,7 +203,7 @@
       "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
       "dev": true,
       "requires": {
-        "mime-types": "2.1.18",
+        "mime-types": "~2.1.18",
         "negotiator": "0.6.1"
       }
     },
@@ -219,7 +219,7 @@
       "integrity": "sha1-/YJw9x+7SZawBPqIDuXUZXOnMb8=",
       "dev": true,
       "requires": {
-        "acorn": "4.0.13"
+        "acorn": "^4.0.4"
       },
       "dependencies": {
         "acorn": {
@@ -236,7 +236,7 @@
       "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "acorn": "^3.0.4"
       },
       "dependencies": {
         "acorn": {
@@ -253,10 +253,10 @@
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
       "dev": true,
       "requires": {
-        "co": "4.6.0",
-        "fast-deep-equal": "1.1.0",
-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.3.1"
+        "co": "^4.6.0",
+        "fast-deep-equal": "^1.0.0",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.3.0"
       }
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     "ajv-keywords": {
@@ -271,9 +271,9 @@
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
       "requires": {
-        "kind-of": "3.2.2",
-        "longest": "1.0.1",
-        "repeat-string": "1.6.1"
+        "kind-of": "^3.0.2",
+        "longest": "^1.0.1",
+        "repeat-string": "^1.5.2"
       }
     },
     "amdefine": {
@@ -315,7 +315,7 @@
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       "dev": true,
       "requires": {
-        "color-convert": "1.9.1"
+        "color-convert": "^1.9.0"
       }
     },
     "any-observable": {
@@ -330,8 +330,8 @@
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       "dev": true,
       "requires": {
-        "micromatch": "2.3.11",
-        "normalize-path": "2.1.1"
+        "micromatch": "^2.1.5",
+        "normalize-path": "^2.0.0"
       }
     },
     "argparse": {
@@ -340,7 +340,7 @@
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       "dev": true,
       "requires": {
-        "sprintf-js": "1.0.3"
+        "sprintf-js": "~1.0.2"
       }
     },
     "arr-diff": {
@@ -349,7 +349,7 @@
       "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
       "dev": true,
       "requires": {
-        "arr-flatten": "1.1.0"
+        "arr-flatten": "^1.0.1"
       }
     },
     "arr-flatten": {
@@ -382,8 +382,8 @@
       "integrity": "sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=",
       "dev": true,
       "requires": {
-        "define-properties": "1.1.2",
-        "es-abstract": "1.10.0"
+        "define-properties": "^1.1.2",
+        "es-abstract": "^1.7.0"
       }
     },
     "array-union": {
@@ -392,7 +392,7 @@
       "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
       "dev": true,
       "requires": {
-        "array-uniq": "1.0.3"
+        "array-uniq": "^1.0.1"
       }
     },
     "array-uniq": {
@@ -467,8 +467,8 @@
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       "dev": true,
       "requires": {
-        "semver": "5.5.0",
-        "shimmer": "1.2.0"
+        "semver": "^5.3.0",
+        "shimmer": "^1.1.0"
       }
     },
     "asynckit": {
@@ -501,21 +501,21 @@
       "integrity": "sha1-UCq1SHTX24itALiHoGODzgPQAvE=",
       "dev": true,
       "requires": {
-        "babel-core": "6.26.0",
-        "babel-polyfill": "6.26.0",
-        "babel-register": "6.26.0",
-        "babel-runtime": "6.26.0",
-        "chokidar": "1.7.0",
-        "commander": "2.15.0",
-        "convert-source-map": "1.5.1",
-        "fs-readdir-recursive": "1.1.0",
-        "glob": "7.1.2",
-        "lodash": "4.17.5",
-        "output-file-sync": "1.1.2",
-        "path-is-absolute": "1.0.1",
-        "slash": "1.0.0",
-        "source-map": "0.5.7",
-        "v8flags": "2.1.1"
+        "babel-core": "^6.26.0",
+        "babel-polyfill": "^6.26.0",
+        "babel-register": "^6.26.0",
+        "babel-runtime": "^6.26.0",
+        "chokidar": "^1.6.1",
+        "commander": "^2.11.0",
+        "convert-source-map": "^1.5.0",
+        "fs-readdir-recursive": "^1.0.0",
+        "glob": "^7.1.2",
+        "lodash": "^4.17.4",
+        "output-file-sync": "^1.1.2",
+        "path-is-absolute": "^1.0.1",
+        "slash": "^1.0.0",
+        "source-map": "^0.5.6",
+        "v8flags": "^2.1.1"
       }
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     "babel-code-frame": {
@@ -524,9 +524,9 @@
       "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
       },
       "dependencies": {
         "ansi-styles": {
@@ -541,11 +541,11 @@
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
-            "ansi-styles": "2.2.1",
-            "escape-string-regexp": "1.0.5",
-            "has-ansi": "2.0.0",
-            "strip-ansi": "3.0.1",
-            "supports-color": "2.0.0"
+            "ansi-styles": "^2.2.1",
+            "escape-string-regexp": "^1.0.2",
+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
           }
         },
         "supports-color": {
@@ -562,25 +562,25 @@
       "integrity": "sha1-rzL3izGm/O8RnIew/Y2XU/A6C7g=",
       "dev": true,
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-        "babel-code-frame": "6.26.0",
-        "babel-generator": "6.26.1",
-        "babel-helpers": "6.24.1",
-        "babel-messages": "6.23.0",
-        "babel-register": "6.26.0",
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-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0",
-        "babylon": "6.18.0",
-        "convert-source-map": "1.5.1",
-        "debug": "2.6.9",
-        "json5": "0.5.1",
-        "lodash": "4.17.5",
-        "minimatch": "3.0.4",
-        "path-is-absolute": "1.0.1",
-        "private": "0.1.8",
-        "slash": "1.0.0",
-        "source-map": "0.5.7"
+        "babel-code-frame": "^6.26.0",
+        "babel-generator": "^6.26.0",
+        "babel-helpers": "^6.24.1",
+        "babel-messages": "^6.23.0",
+        "babel-register": "^6.26.0",
+        "babel-runtime": "^6.26.0",
+        "babel-template": "^6.26.0",
+        "babel-traverse": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "babylon": "^6.18.0",
+        "convert-source-map": "^1.5.0",
+        "debug": "^2.6.8",
+        "json5": "^0.5.1",
+        "lodash": "^4.17.4",
+        "minimatch": "^3.0.4",
+        "path-is-absolute": "^1.0.1",
+        "private": "^0.1.7",
+        "slash": "^1.0.0",
+        "source-map": "^0.5.6"
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     "babel-eslint": {
@@ -589,12 +589,12 @@
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       "dev": true,
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-        "@babel/traverse": "7.0.0-beta.42",
-        "@babel/types": "7.0.0-beta.42",
-        "babylon": "7.0.0-beta.42",
-        "eslint-scope": "3.7.1",
-        "eslint-visitor-keys": "1.0.0"
+        "@babel/code-frame": "^7.0.0-beta.40",
+        "@babel/traverse": "^7.0.0-beta.40",
+        "@babel/types": "^7.0.0-beta.40",
+        "babylon": "^7.0.0-beta.40",
+        "eslint-scope": "~3.7.1",
+        "eslint-visitor-keys": "^1.0.0"
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       "dependencies": {
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@@ -611,14 +611,14 @@
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-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "detect-indent": "4.0.0",
-        "jsesc": "1.3.0",
-        "lodash": "4.17.5",
-        "source-map": "0.5.7",
-        "trim-right": "1.0.1"
+        "babel-messages": "^6.23.0",
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "detect-indent": "^4.0.0",
+        "jsesc": "^1.3.0",
+        "lodash": "^4.17.4",
+        "source-map": "^0.5.7",
+        "trim-right": "^1.0.1"
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     "babel-helper-bindify-decorators": {
@@ -627,9 +627,9 @@
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       "dev": true,
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-builder-binary-assignment-operator-visitor": {
@@ -638,9 +638,9 @@
       "integrity": "sha1-zORReto1b0IgvK6KAsKzRvmlZmQ=",
       "dev": true,
       "requires": {
-        "babel-helper-explode-assignable-expression": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-explode-assignable-expression": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
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     "babel-helper-call-delegate": {
@@ -649,10 +649,10 @@
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       "dev": true,
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-        "babel-runtime": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-hoist-variables": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
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     "babel-helper-define-map": {
@@ -661,10 +661,10 @@
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-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "lodash": "4.17.5"
+        "babel-helper-function-name": "^6.24.1",
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "lodash": "^4.17.4"
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@@ -673,9 +673,9 @@
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-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
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     "babel-helper-explode-class": {
@@ -684,10 +684,10 @@
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-        "babel-runtime": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-bindify-decorators": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
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@@ -696,11 +696,11 @@
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       "dev": true,
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-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-get-function-arity": "^6.24.1",
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+        "babel-template": "^6.24.1",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
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@@ -709,8 +709,8 @@
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       "dev": true,
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
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@@ -719,8 +719,8 @@
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       "dev": true,
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
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     "babel-helper-optimise-call-expression": {
@@ -729,8 +729,8 @@
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       "dev": true,
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
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@@ -739,9 +739,9 @@
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       "dev": true,
       "requires": {
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-        "babel-types": "6.26.0",
-        "lodash": "4.17.5"
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "lodash": "^4.17.4"
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     "babel-helper-remap-async-to-generator": {
@@ -750,11 +750,11 @@
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       "dev": true,
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-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-function-name": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.24.1",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
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     "babel-helper-replace-supers": {
@@ -763,12 +763,12 @@
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@@ -3014,13 +3014,13 @@
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-        "strip-eof": "1.0.0"
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+        "p-finally": "^1.0.0",
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@@ -3041,7 +3041,7 @@
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@@ -3050,7 +3050,7 @@
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@@ -3059,7 +3059,7 @@
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@@ -3068,36 +3068,36 @@
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-        "content-type": "1.0.4",
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-        "escape-html": "1.0.3",
-        "etag": "1.8.1",
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+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
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-        "on-finished": "2.3.0",
-        "parseurl": "1.3.2",
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-        "statuses": "1.4.0",
-        "type-is": "1.6.16",
+        "statuses": "~1.4.0",
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@@ -3107,15 +3107,15 @@
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@@ -3151,7 +3151,7 @@
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+                "statuses": ">= 1.3.1 < 2"
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@@ -3182,8 +3182,8 @@
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+        "assign-symbols": "^1.0.0",
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@@ -3192,7 +3192,7 @@
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@@ -3203,9 +3203,9 @@
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-        "tmp": "0.0.33"
+        "chardet": "^0.4.0",
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@@ -3214,7 +3214,7 @@
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       "dev": true,
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+        "is-extglob": "^1.0.0"
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@@ -3247,13 +3247,13 @@
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-        "promise": "7.3.1",
-        "setimmediate": "1.0.5",
-        "ua-parser-js": "0.7.17"
+        "core-js": "^1.0.0",
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+        "object-assign": "^4.1.0",
+        "promise": "^7.1.1",
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@@ -3276,7 +3276,7 @@
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+        "escape-string-regexp": "^1.0.5"
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@@ -3285,8 +3285,8 @@
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-        "object-assign": "4.1.1"
+        "flat-cache": "^1.2.1",
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@@ -3301,11 +3301,11 @@
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-        "repeat-element": "1.1.2",
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+        "is-number": "^2.1.0",
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@@ -3315,12 +3315,12 @@
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-        "statuses": "1.4.0",
-        "unpipe": "1.0.0"
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
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+        "parseurl": "~1.3.2",
+        "statuses": "~1.4.0",
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@@ -3337,8 +3337,8 @@
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-        "pinkie-promise": "2.0.1"
+        "path-exists": "^2.0.0",
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@@ -3347,7 +3347,7 @@
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+        "readable-stream": "^2.0.2"
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@@ -3356,10 +3356,10 @@
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-        "graceful-fs": "4.1.11",
-        "write": "0.2.1"
+        "circular-json": "^0.3.1",
+        "del": "^2.0.2",
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@@ -3374,7 +3374,7 @@
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       "dev": true,
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+        "is-function": "~1.0.0"
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@@ -3389,7 +3389,7 @@
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       "dev": true,
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+        "for-in": "^1.0.1"
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@@ -3410,9 +3410,9 @@
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       "dev": true,
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@@ -3427,7 +3427,7 @@
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       "dev": true,
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+        "map-cache": "^0.2.2"
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@@ -3442,8 +3442,8 @@
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+        "inherits": "^2.0.1",
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@@ -3452,9 +3452,9 @@
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-        "jsonfile": "4.0.0",
-        "universalify": "0.1.1"
+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
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@@ -3476,8 +3476,8 @@
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-        "node-pre-gyp": "0.6.39"
+        "nan": "^2.3.0",
+        "node-pre-gyp": "^0.6.39"
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@@ -3494,8 +3494,8 @@
           "dev": true,
           "optional": true,
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-            "co": "4.6.0",
-            "json-stable-stringify": "1.0.1"
+            "co": "^4.6.0",
+            "json-stable-stringify": "^1.0.1"
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@@ -3518,8 +3518,8 @@
           "dev": true,
           "optional": true,
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-            "delegates": "1.0.0",
-            "readable-stream": "2.2.9"
+            "delegates": "^1.0.0",
+            "readable-stream": "^2.0.6"
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@@ -3570,7 +3570,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "tweetnacl": "0.14.5"
+            "tweetnacl": "^0.14.3"
           }
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@@ -3579,7 +3579,7 @@
           "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
           "dev": true,
           "requires": {
-            "inherits": "2.0.3"
+            "inherits": "~2.0.0"
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@@ -3588,7 +3588,7 @@
           "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
           "dev": true,
           "requires": {
-            "hoek": "2.16.3"
+            "hoek": "2.x.x"
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@@ -3597,7 +3597,7 @@
           "integrity": "sha1-Pv/DxQ4ABTH7cg6v+A8K6O8jz1k=",
           "dev": true,
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-            "balanced-match": "0.4.2",
+            "balanced-match": "^0.4.1",
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@@ -3633,7 +3633,7 @@
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           "dev": true,
           "requires": {
-            "delayed-stream": "1.0.0"
+            "delayed-stream": "~1.0.0"
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@@ -3660,7 +3660,7 @@
           "integrity": "sha1-O9/s3GCBR8HGcgL6KR59ylnqo7g=",
           "dev": true,
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-            "boom": "2.10.1"
+            "boom": "2.x.x"
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@@ -3670,7 +3670,7 @@
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           "optional": true,
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+            "assert-plus": "^1.0.0"
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@@ -3726,7 +3726,7 @@
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+            "jsbn": "~0.1.0"
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@@ -3756,9 +3756,9 @@
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-            "asynckit": "0.4.0",
-            "combined-stream": "1.0.5",
-            "mime-types": "2.1.15"
+            "asynckit": "^0.4.0",
+            "combined-stream": "^1.0.5",
+            "mime-types": "^2.1.12"
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@@ -3773,10 +3773,10 @@
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           "dev": true,
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-            "graceful-fs": "4.1.11",
-            "inherits": "2.0.3",
-            "mkdirp": "0.5.1",
-            "rimraf": "2.6.1"
+            "graceful-fs": "^4.1.2",
+            "inherits": "~2.0.0",
+            "mkdirp": ">=0.5 0",
+            "rimraf": "2"
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@@ -3786,9 +3786,9 @@
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           "optional": true,
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-            "fstream": "1.0.11",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4"
+            "fstream": "^1.0.0",
+            "inherits": "2",
+            "minimatch": "^3.0.0"
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@@ -3798,14 +3798,14 @@
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-            "console-control-strings": "1.1.0",
-            "has-unicode": "2.0.1",
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-            "string-width": "1.0.2",
-            "strip-ansi": "3.0.1",
-            "wide-align": "1.1.2"
+            "aproba": "^1.0.3",
+            "console-control-strings": "^1.0.0",
+            "has-unicode": "^2.0.0",
+            "object-assign": "^4.1.0",
+            "signal-exit": "^3.0.0",
+            "string-width": "^1.0.1",
+            "strip-ansi": "^3.0.1",
+            "wide-align": "^1.1.0"
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@@ -3815,7 +3815,7 @@
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@@ -3833,12 +3833,12 @@
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-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
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@@ -3861,8 +3861,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "ajv": "4.11.8",
-            "har-schema": "1.0.5"
+            "ajv": "^4.9.1",
+            "har-schema": "^1.0.5"
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@@ -3878,10 +3878,10 @@
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           "dev": true,
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-            "boom": "2.10.1",
-            "cryptiles": "2.0.5",
-            "hoek": "2.16.3",
-            "sntp": "1.0.9"
+            "boom": "2.x.x",
+            "cryptiles": "2.x.x",
+            "hoek": "2.x.x",
+            "sntp": "1.x.x"
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@@ -3897,9 +3897,9 @@
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           "optional": true,
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-            "assert-plus": "0.2.0",
-            "jsprim": "1.4.0",
-            "sshpk": "1.13.0"
+            "assert-plus": "^0.2.0",
+            "jsprim": "^1.2.2",
+            "sshpk": "^1.7.0"
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@@ -3908,8 +3908,8 @@
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           "dev": true,
           "requires": {
-            "once": "1.4.0",
-            "wrappy": "1.0.2"
+            "once": "^1.3.0",
+            "wrappy": "1"
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@@ -3931,7 +3931,7 @@
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           "dev": true,
           "requires": {
-            "number-is-nan": "1.0.1"
+            "number-is-nan": "^1.0.0"
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@@ -3961,7 +3961,7 @@
           "dev": true,
           "optional": true,
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-            "jsbn": "0.1.1"
+            "jsbn": "~0.1.0"
           }
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@@ -3985,7 +3985,7 @@
           "dev": true,
           "optional": true,
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-            "jsonify": "0.0.0"
+            "jsonify": "~0.0.0"
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@@ -4036,7 +4036,7 @@
           "integrity": "sha1-pOv1BkCUVpI3uM9wBGd20J/JKu0=",
           "dev": true,
           "requires": {
-            "mime-db": "1.27.0"
+            "mime-db": "~1.27.0"
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@@ -4045,7 +4045,7 @@
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           "dev": true,
           "requires": {
-            "brace-expansion": "1.1.7"
+            "brace-expansion": "^1.1.7"
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@@ -4077,17 +4077,17 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "detect-libc": "1.0.2",
+            "detect-libc": "^1.0.2",
             "hawk": "3.1.3",
-            "mkdirp": "0.5.1",
-            "nopt": "4.0.1",
-            "npmlog": "4.1.0",
-            "rc": "1.2.1",
+            "mkdirp": "^0.5.1",
+            "nopt": "^4.0.1",
+            "npmlog": "^4.0.2",
+            "rc": "^1.1.7",
             "request": "2.81.0",
-            "rimraf": "2.6.1",
-            "semver": "5.3.0",
-            "tar": "2.2.1",
-            "tar-pack": "3.4.0"
+            "rimraf": "^2.6.1",
+            "semver": "^5.3.0",
+            "tar": "^2.2.1",
+            "tar-pack": "^3.4.0"
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@@ -4097,8 +4097,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "abbrev": "1.1.0",
-            "osenv": "0.1.4"
+            "abbrev": "1",
+            "osenv": "^0.1.4"
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@@ -4108,10 +4108,10 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "are-we-there-yet": "1.1.4",
-            "console-control-strings": "1.1.0",
-            "gauge": "2.7.4",
-            "set-blocking": "2.0.0"
+            "are-we-there-yet": "~1.1.2",
+            "console-control-strings": "~1.1.0",
+            "gauge": "~2.7.3",
+            "set-blocking": "~2.0.0"
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@@ -4140,7 +4140,7 @@
           "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
           "dev": true,
           "requires": {
-            "wrappy": "1.0.2"
+            "wrappy": "1"
           }
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         "os-homedir": {
@@ -4164,8 +4164,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "os-homedir": "1.0.2",
-            "os-tmpdir": "1.0.2"
+            "os-homedir": "^1.0.0",
+            "os-tmpdir": "^1.0.0"
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@@ -4208,10 +4208,10 @@
           "dev": true,
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-            "deep-extend": "0.4.2",
-            "ini": "1.3.4",
-            "minimist": "1.2.0",
-            "strip-json-comments": "2.0.1"
+            "deep-extend": "~0.4.0",
+            "ini": "~1.3.0",
+            "minimist": "^1.2.0",
+            "strip-json-comments": "~2.0.1"
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@@ -4229,13 +4229,13 @@
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           "dev": true,
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-            "inherits": "2.0.3",
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-            "process-nextick-args": "1.0.7",
-            "string_decoder": "1.0.1",
-            "util-deprecate": "1.0.2"
+            "buffer-shims": "~1.0.0",
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.1",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~1.0.6",
+            "string_decoder": "~1.0.0",
+            "util-deprecate": "~1.0.1"
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@@ -4245,28 +4245,28 @@
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-            "aws4": "1.6.0",
-            "caseless": "0.12.0",
-            "combined-stream": "1.0.5",
-            "extend": "3.0.1",
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-            "har-validator": "4.2.1",
-            "hawk": "3.1.3",
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-            "oauth-sign": "0.8.2",
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-            "qs": "6.4.0",
-            "safe-buffer": "5.0.1",
-            "stringstream": "0.0.5",
-            "tough-cookie": "2.3.2",
-            "tunnel-agent": "0.6.0",
-            "uuid": "3.0.1"
+            "aws-sign2": "~0.6.0",
+            "aws4": "^1.2.1",
+            "caseless": "~0.12.0",
+            "combined-stream": "~1.0.5",
+            "extend": "~3.0.0",
+            "forever-agent": "~0.6.1",
+            "form-data": "~2.1.1",
+            "har-validator": "~4.2.1",
+            "hawk": "~3.1.3",
+            "http-signature": "~1.1.0",
+            "is-typedarray": "~1.0.0",
+            "isstream": "~0.1.2",
+            "json-stringify-safe": "~5.0.1",
+            "mime-types": "~2.1.7",
+            "oauth-sign": "~0.8.1",
+            "performance-now": "^0.2.0",
+            "qs": "~6.4.0",
+            "safe-buffer": "^5.0.1",
+            "stringstream": "~0.0.4",
+            "tough-cookie": "~2.3.0",
+            "tunnel-agent": "^0.6.0",
+            "uuid": "^3.0.0"
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@@ -4275,7 +4275,7 @@
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           "dev": true,
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-            "glob": "7.1.2"
+            "glob": "^7.0.5"
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@@ -4311,7 +4311,7 @@
           "integrity": "sha1-ZUEYTMkK7qbG57NeJlkIJEPGYZg=",
           "dev": true,
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-            "hoek": "2.16.3"
+            "hoek": "2.x.x"
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@@ -4321,15 +4321,15 @@
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-            "assert-plus": "1.0.0",
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-            "dashdash": "1.14.1",
-            "ecc-jsbn": "0.1.1",
-            "getpass": "0.1.7",
-            "jodid25519": "1.0.2",
-            "jsbn": "0.1.1",
-            "tweetnacl": "0.14.5"
+            "asn1": "~0.2.3",
+            "assert-plus": "^1.0.0",
+            "bcrypt-pbkdf": "^1.0.0",
+            "dashdash": "^1.12.0",
+            "ecc-jsbn": "~0.1.1",
+            "getpass": "^0.1.1",
+            "jodid25519": "^1.0.0",
+            "jsbn": "~0.1.0",
+            "tweetnacl": "~0.14.0"
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@@ -4347,9 +4347,9 @@
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-            "code-point-at": "1.1.0",
-            "is-fullwidth-code-point": "1.0.0",
-            "strip-ansi": "3.0.1"
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
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@@ -4358,7 +4358,7 @@
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           "dev": true,
           "requires": {
-            "safe-buffer": "5.0.1"
+            "safe-buffer": "^5.0.1"
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@@ -4374,7 +4374,7 @@
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           "dev": true,
           "requires": {
-            "ansi-regex": "2.1.1"
+            "ansi-regex": "^2.0.0"
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@@ -4390,9 +4390,9 @@
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           "dev": true,
           "requires": {
-            "block-stream": "0.0.9",
-            "fstream": "1.0.11",
-            "inherits": "2.0.3"
+            "block-stream": "*",
+            "fstream": "^1.0.2",
+            "inherits": "2"
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@@ -4402,14 +4402,14 @@
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-            "fstream": "1.0.11",
-            "fstream-ignore": "1.0.5",
-            "once": "1.4.0",
-            "readable-stream": "2.2.9",
-            "rimraf": "2.6.1",
-            "tar": "2.2.1",
-            "uid-number": "0.0.6"
+            "debug": "^2.2.0",
+            "fstream": "^1.0.10",
+            "fstream-ignore": "^1.0.5",
+            "once": "^1.3.3",
+            "readable-stream": "^2.1.4",
+            "rimraf": "^2.5.1",
+            "tar": "^2.2.1",
+            "uid-number": "^0.0.6"
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@@ -4419,7 +4419,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "punycode": "1.4.1"
+            "punycode": "^1.4.1"
           }
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@@ -4429,7 +4429,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "safe-buffer": "5.0.1"
+            "safe-buffer": "^5.0.1"
           }
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         "tweetnacl": {
@@ -4476,7 +4476,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "string-width": "1.0.2"
+            "string-width": "^1.0.2"
           }
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@@ -4505,8 +4505,8 @@
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       "dev": true,
       "requires": {
-        "source-map-support": "0.5.4",
-        "webpack-cli": "2.0.12"
+        "source-map-support": "^0.5.3",
+        "webpack-cli": "^2.0.9"
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@@ -4521,7 +4521,7 @@
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           "dev": true,
           "requires": {
-            "source-map": "0.6.1"
+            "source-map": "^0.6.0"
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@@ -4550,7 +4550,7 @@
       "integrity": "sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=",
       "dev": true,
       "requires": {
-        "assert-plus": "1.0.0"
+        "assert-plus": "^1.0.0"
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@@ -4559,8 +4559,8 @@
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       "dev": true,
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-        "got": "7.1.0",
-        "is-plain-obj": "1.1.0"
+        "got": "^7.0.0",
+        "is-plain-obj": "^1.1.0"
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@@ -4569,20 +4569,20 @@
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@@ -6024,8 +6024,8 @@
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-        "path-exists": "3.0.0"
+        "p-locate": "^2.0.0",
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@@ -6139,7 +6139,7 @@
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@@ -6154,8 +6154,8 @@
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@@ -10630,7 +10631,7 @@
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         "is-fullwidth-code-point": {
@@ -10645,9 +10646,9 @@
           "integrity": "sha512-3sslG3zJbEYcaC4YVAvDorjGxc7tv6KVATnLPZONiljsUncvihe9BQoVCEs0RZ1kmf4Hk9OBqlZfJZWI4GanKA==",
           "dev": true,
           "requires": {
-            "execa": "0.7.0",
-            "lcid": "1.0.0",
-            "mem": "1.1.0"
+            "execa": "^0.7.0",
+            "lcid": "^1.0.0",
+            "mem": "^1.1.0"
           }
         },
         "string-width": {
@@ -10656,8 +10657,8 @@
           "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
           "dev": true,
           "requires": {
-            "is-fullwidth-code-point": "2.0.0",
-            "strip-ansi": "4.0.0"
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
           }
         },
         "strip-ansi": {
@@ -10666,7 +10667,7 @@
           "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
           "dev": true,
           "requires": {
-            "ansi-regex": "3.0.0"
+            "ansi-regex": "^3.0.0"
           }
         },
         "which-module": {
@@ -10681,7 +10682,7 @@
           "integrity": "sha1-nM9qQ0YP5O1Aqbto9I1DuKaMwHc=",
           "dev": true,
           "requires": {
-            "camelcase": "4.1.0"
+            "camelcase": "^4.1.0"
           }
         }
       }
@@ -10692,8 +10693,8 @@
       "integrity": "sha1-hVaN488VD/SfpRgl8DqMiA3cxcQ=",
       "dev": true,
       "requires": {
-        "camelcase": "3.0.0",
-        "lodash.assign": "4.2.0"
+        "camelcase": "^3.0.0",
+        "lodash.assign": "^4.0.6"
       }
     },
     "yeoman-environment": {
@@ -10702,19 +10703,19 @@
       "integrity": "sha512-6/W7/B54OPHJXob0n0+pmkwFsirC8cokuQkPSmT/D0lCcSxkKtg/BA6ZnjUBIwjuGqmw3DTrT4en++htaUju5g==",
       "dev": true,
       "requires": {
-        "chalk": "2.3.2",
-        "debug": "3.1.0",
-        "diff": "3.5.0",
-        "escape-string-regexp": "1.0.5",
-        "globby": "6.1.0",
-        "grouped-queue": "0.3.3",
-        "inquirer": "3.3.0",
-        "is-scoped": "1.0.0",
-        "lodash": "4.17.5",
-        "log-symbols": "2.2.0",
-        "mem-fs": "1.1.3",
-        "text-table": "0.2.0",
-        "untildify": "3.0.2"
+        "chalk": "^2.1.0",
+        "debug": "^3.1.0",
+        "diff": "^3.3.1",
+        "escape-string-regexp": "^1.0.2",
+        "globby": "^6.1.0",
+        "grouped-queue": "^0.3.3",
+        "inquirer": "^3.3.0",
+        "is-scoped": "^1.0.0",
+        "lodash": "^4.17.4",
+        "log-symbols": "^2.1.0",
+        "mem-fs": "^1.1.0",
+        "text-table": "^0.2.0",
+        "untildify": "^3.0.2"
       },
       "dependencies": {
         "debug": {
@@ -10732,11 +10733,11 @@
           "integrity": "sha1-9abXDoOV4hyFj7BInWTfAkJNUGw=",
           "dev": true,
           "requires": {
-            "array-union": "1.0.2",
-            "glob": "7.1.2",
-            "object-assign": "4.1.1",
-            "pify": "2.3.0",
-            "pinkie-promise": "2.0.1"
+            "array-union": "^1.0.1",
+            "glob": "^7.0.3",
+            "object-assign": "^4.0.1",
+            "pify": "^2.0.0",
+            "pinkie-promise": "^2.0.0"
           }
         }
       }
@@ -10747,31 +10748,31 @@
       "integrity": "sha512-mODmrZ26a94djmGZZuIiomSGlN4wULdou29ZwcySupb2e9FdvoCl7Ps2FqHFjEHio3kOl/iBeaNqrnx3C3NwWg==",
       "dev": true,
       "requires": {
-        "async": "2.6.0",
-        "chalk": "2.3.2",
-        "cli-table": "0.3.1",
-        "cross-spawn": "5.1.0",
-        "dargs": "5.1.0",
-        "dateformat": "3.0.3",
-        "debug": "3.1.0",
-        "detect-conflict": "1.0.1",
-        "error": "7.0.2",
-        "find-up": "2.1.0",
-        "github-username": "4.1.0",
-        "istextorbinary": "2.2.1",
-        "lodash": "4.17.5",
-        "make-dir": "1.2.0",
-        "mem-fs-editor": "3.0.2",
-        "minimist": "1.2.0",
-        "pretty-bytes": "4.0.2",
-        "read-chunk": "2.1.0",
-        "read-pkg-up": "3.0.0",
-        "rimraf": "2.6.2",
-        "run-async": "2.3.0",
-        "shelljs": "0.8.1",
-        "text-table": "0.2.0",
-        "through2": "2.0.3",
-        "yeoman-environment": "2.0.5"
+        "async": "^2.6.0",
+        "chalk": "^2.3.0",
+        "cli-table": "^0.3.1",
+        "cross-spawn": "^5.1.0",
+        "dargs": "^5.1.0",
+        "dateformat": "^3.0.2",
+        "debug": "^3.1.0",
+        "detect-conflict": "^1.0.0",
+        "error": "^7.0.2",
+        "find-up": "^2.1.0",
+        "github-username": "^4.0.0",
+        "istextorbinary": "^2.1.0",
+        "lodash": "^4.17.4",
+        "make-dir": "^1.1.0",
+        "mem-fs-editor": "^3.0.2",
+        "minimist": "^1.2.0",
+        "pretty-bytes": "^4.0.2",
+        "read-chunk": "^2.1.0",
+        "read-pkg-up": "^3.0.0",
+        "rimraf": "^2.6.2",
+        "run-async": "^2.0.0",
+        "shelljs": "^0.8.0",
+        "text-table": "^0.2.0",
+        "through2": "^2.0.0",
+        "yeoman-environment": "^2.0.5"
       },
       "dependencies": {
         "async": {
@@ -10780,7 +10781,7 @@
           "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
           "dev": true,
           "requires": {
-            "lodash": "4.17.5"
+            "lodash": "^4.14.0"
           }
         },
         "debug": {
@@ -10798,7 +10799,7 @@
           "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
           "dev": true,
           "requires": {
-            "locate-path": "2.0.0"
+            "locate-path": "^2.0.0"
           }
         },
         "load-json-file": {
@@ -10807,10 +10808,10 @@
           "integrity": "sha1-L19Fq5HjMhYjT9U62rZo607AmTs=",
           "dev": true,
           "requires": {
-            "graceful-fs": "4.1.11",
-            "parse-json": "4.0.0",
-            "pify": "3.0.0",
-            "strip-bom": "3.0.0"
+            "graceful-fs": "^4.1.2",
+            "parse-json": "^4.0.0",
+            "pify": "^3.0.0",
+            "strip-bom": "^3.0.0"
           }
         },
         "minimist": {
@@ -10825,8 +10826,8 @@
           "integrity": "sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=",
           "dev": true,
           "requires": {
-            "error-ex": "1.3.1",
-            "json-parse-better-errors": "1.0.1"
+            "error-ex": "^1.3.1",
+            "json-parse-better-errors": "^1.0.1"
           }
         },
         "path-type": {
@@ -10835,7 +10836,7 @@
           "integrity": "sha512-T2ZUsdZFHgA3u4e5PfPbjd7HDDpxPnQb5jN0SrDsjNSuVXHJqtwTnWqG0B1jZrgmJ/7lj1EmVIByWt1gxGkWvg==",
           "dev": true,
           "requires": {
-            "pify": "3.0.0"
+            "pify": "^3.0.0"
           }
         },
         "pify": {
@@ -10850,9 +10851,9 @@
           "integrity": "sha1-nLxoaXj+5l0WwA4rGcI3/Pbjg4k=",
           "dev": true,
           "requires": {
-            "load-json-file": "4.0.0",
-            "normalize-package-data": "2.4.0",
-            "path-type": "3.0.0"
+            "load-json-file": "^4.0.0",
+            "normalize-package-data": "^2.3.2",
+            "path-type": "^3.0.0"
           }
         },
         "read-pkg-up": {
@@ -10861,8 +10862,8 @@
           "integrity": "sha1-PtSWaF26D4/hGNBpHcUfSh/5bwc=",
           "dev": true,
           "requires": {
-            "find-up": "2.1.0",
-            "read-pkg": "3.0.0"
+            "find-up": "^2.0.0",
+            "read-pkg": "^3.0.0"
           }
         },
         "strip-bom": {
diff --git a/package.json b/package.json
index f0a825d9..a800f1dd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@daostack/arc",
-  "version": "0.0.0-alpha.43",
+  "version": "0.0.0-alpha.44",
   "description": "A platform for building DAOs",
   "files": [
     "contracts/",
diff --git a/test/orderstatistictree.js b/test/orderstatistictree.js
index 1d2899df..02acdc95 100644
--- a/test/orderstatistictree.js
+++ b/test/orderstatistictree.js
@@ -44,7 +44,8 @@ contract('OrderStatisticTree', function () {
     var tx,val;
     var maxGasUsed = 0;
     var values = {};
-    var elementNumber = 100;
+    var elementNumber = 50;
+    
     for (var i = 0;i<elementNumber;i++) {
       values[i] = await getRandomInt(500);
       tx = await orderStatisticTree.insert(values[i]);