Merge pull request #33 from atomiix/php81

Update dependencies to make it php81 compatible

.github/workflows/php.yml

@@ -4,7 +4,7 @@ jobs:
   build:
     strategy:
       matrix:
-        php-versions: ['7.2','7.4']
+        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1']
     runs-on: ubuntu-latest
     name: PHPUnit
     steps:

.gitignore

@@ -1,2 +1,3 @@
 composer.lock
-vendor/
+vendor/
+tests/.phpunit.result.cache

composer.json

@@ -12,13 +12,13 @@
     }
   ],
   "require": {
-    "php": "^7.1",
-    "phpstan/phpstan": "^0.12.48"
+    "php": "^7.2|^8.0",
+    "phpstan/phpstan": "^1.2.0"
   },
   "require-dev": {
-    "phpstan/phpstan-phpunit": "^0.12.16",
-    "phpstan/phpstan-strict-rules": "^0.12.5",
-    "phpunit/phpunit": "^7.5.20",
+    "phpstan/phpstan-phpunit": "^1.0.0",
+    "phpstan/phpstan-strict-rules": "^1.1.0",
+    "phpunit/phpunit": "^8.5",
     "symfony/console": "^5.2",
     "nikic/php-parser": "^4.10"
   },