Upgrade PHPStan, PHPUnit, CS

Author: simPod

composer.json

@@ -17,11 +17,11 @@
         "doctrine/dbal": "2.*"
     },
     "require-dev": {
-        "doctrine/coding-standard": "^5.0",
-        "phpstan/phpstan": "^0.10.7",
-        "phpstan/phpstan-phpunit": "^0.10.0",
-        "phpstan/phpstan-strict-rules": "^0.10.1",
-        "phpunit/phpunit": "^7.5"
+        "doctrine/coding-standard": "^6.0",
+        "phpstan/phpstan": "^0.11.16",
+        "phpstan/phpstan-phpunit": "^0.11.2",
+        "phpstan/phpstan-strict-rules": "^0.11.1",
+        "phpunit/phpunit": "^8.4"
     },
     "autoload": {
         "psr-4": {