[TASK] Update PHPStan packages to v2

| datasource | package                           | from   | to    |
| ---------- | --------------------------------- | ------ | ----- |
| packagist  | phpstan/phpstan                   | 1.12.9 | 2.0.1 |
| packagist  | phpstan/phpstan-deprecation-rules | 1.2.1  | 2.0.0 |
| packagist  | phpstan/phpstan-phpunit           | 1.4.0  | 2.0.0 |
| packagist  | phpstan/phpstan-strict-rules      | 1.6.1  | 2.0.0 |
| packagist  | phpstan/phpstan-symfony           | 1.4.12 | 2.0.0 |
| packagist  | phpstan/phpstan-webmozart-assert  | 1.2.11 | 2.0.0 |

composer.json

@@ -52,12 +52,12 @@
 		"eliashaeussler/version-bumper": "^1.2",
 		"ergebnis/composer-normalize": "^2.26",
 		"phpstan/extension-installer": "^1.2",
-		"phpstan/phpstan": "^1.9",
-		"phpstan/phpstan-deprecation-rules": "^1.1",
-		"phpstan/phpstan-phpunit": "^1.1",
-		"phpstan/phpstan-strict-rules": "^1.2",
-		"phpstan/phpstan-symfony": "^1.2",
-		"phpstan/phpstan-webmozart-assert": "^1.2",
+		"phpstan/phpstan": "^2.0",
+		"phpstan/phpstan-deprecation-rules": "^2.0",
+		"phpstan/phpstan-phpunit": "^2.0",
+		"phpstan/phpstan-strict-rules": "^2.0",
+		"phpstan/phpstan-symfony": "^2.0",
+		"phpstan/phpstan-webmozart-assert": "^2.0",
 		"phpunit/phpunit": "^10.1 || ^11.0",
 		"rector/rector": "^1.0.0",
 		"seld/jsonlint": "^1.9"