[Composer] Bumped PHPStan to ^2.0

Author: alongosz

composer.json

@@ -29,9 +29,9 @@
         "ibexa/test-core": "~5.0.x-dev",
         "ibexa/user": "~5.0.x-dev",
         "matthiasnoback/symfony-dependency-injection-test": "^5.0",
-        "phpstan/phpstan": "^1.12",
-        "phpstan/phpstan-phpunit": "^1.4",
-        "phpstan/phpstan-symfony": "^1.4",
+        "phpstan/phpstan": "^2.0",
+        "phpstan/phpstan-phpunit": "^2.0",
+        "phpstan/phpstan-symfony": "^2.0",
         "phpunit/phpunit": "^9.6"
     },
     "autoload": {