Merge pull request #192 from shochdoerfer/feature/phpstan_1.4

Deprecate PHPStan 1.3 and make extension compatible with PHPStan 1.4

Author: shochdoerfer

composer.json

@@ -22,7 +22,7 @@
     "php": "^7.2.0 || ^8.0.0",
     "ext-dom": "*",
     "laminas/laminas-code": "~3.3.0 || ~3.4.1 || ~3.5.1",
-    "phpstan/phpstan": "^1.3.0",
+    "phpstan/phpstan": "^1.4.0",
     "symfony/finder": "^3.0 || ^4.0 || ^5.0"
   },
   "conflict": {