Update to phpstan v2

Author: olivervogel

composer.json

@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^10.0 || ^11.0",
-        "phpstan/phpstan": "^1",
+        "phpstan/phpstan": "^2",
         "squizlabs/php_codesniffer": "^3.8",
         "slevomat/coding-standard": "~8.0"
     },