chore(deps): update dependency phpstan/phpstan-phpunit to v2

| datasource | package                 | from  | to    |
| ---------- | ----------------------- | ----- | ----- |
| packagist  | phpstan/phpstan-phpunit | 1.4.1 | 2.0.3 |

Author: renovate[bot]

composer.json

@@ -43,7 +43,7 @@
     "phpstan/extension-installer": "1.4.3",
     "phpstan/phpstan": "1.12.11",
     "phpstan/phpstan-deprecation-rules": "1.2.1",
-    "phpstan/phpstan-phpunit": "1.4.1",
+    "phpstan/phpstan-phpunit": "2.0.3",
     "phpstan/phpstan-strict-rules": "1.6.1",
     "phpunit/phpunit": "10.5.38",
     "psalm/plugin-phpunit": "0.19.0",