Upgrade to Userscripter 5.0.0 (#271)

I used this command to adapt the source code, as suggested in SimonAlling/userscripter#153:

```bash
for f in $(git ls-files "$(git rev-parse --show-toplevel)"); do
  sed -i 's#userscripter/build#userscripter/build-time#g' $f
  sed -i 's#userscripter/lib#userscripter/run-time#g' $f
done
```

💡 `git show --color-words='build-time|(\w|\+|=)+|.'`

metadata.ts

@@ -2,7 +2,7 @@ import { Metadata } from "userscript-metadata";
 import {
     BuildConfig,
     metadataUrl,
-} from "userscripter/build";
+} from "userscripter/build-time";
 
 import U from "./src/userscript";
 

package.json

@@ -50,7 +50,7 @@
     "ts-type-guards": "^0.6.1",
     "typescript": "4.1.6",
     "userscript-metadata": "^1.0.0",
-    "userscripter": "4.0.0",
+    "userscripter": "5.0.0",
     "webpack": "^4.46.0",
     "webpack-cli": "^3.3.12"
   }

src/operations.ts

@@ -1,5 +1,5 @@
-import { DOMCONTENTLOADED } from "userscripter/lib/environment";
-import { Operation, operation } from "userscripter/lib/operations";
+import { DOMCONTENTLOADED } from "userscripter/run-time/environment";
+import { Operation, operation } from "userscripter/run-time/operations";
 
 import * as CONFIG from "~src/config";
 import {

src/preferences.ts

@@ -1,5 +1,5 @@
 import { PreferenceManager } from "ts-preferences";
-import { loggingResponseHandler, subscriptable } from "userscripter/lib/preferences";
+import { loggingResponseHandler, subscriptable } from "userscripter/run-time/preferences";
 
 import * as CONFIG from "~src/config";
 import * as T from "~src/text";

src/stylesheets.ts

@@ -1,6 +1,6 @@
 import * as ms from "milliseconds";
-import { ALWAYS } from "userscripter/lib/environment";
-import { Stylesheets, stylesheet } from "userscripter/lib/stylesheets";
+import { ALWAYS } from "userscripter/run-time/environment";
+import { Stylesheets, stylesheet } from "userscripter/run-time/stylesheets";
 
 import * as CONFIG from "~src/config";
 import { isInEditMode, isOnBSCPreferencesPage, isOnSweclockersSettingsPage, isReadingThread } from "~src/environment";

webpack.config.ts

@@ -4,7 +4,7 @@ import {
     distFileName,
     DEFAULT_BUILD_CONFIG,
     DEFAULT_METADATA_SCHEMA,
-} from "userscripter/build";
+} from "userscripter/build-time";
 import * as webpack from "webpack";
 import { RawSource } from "webpack-sources";