Update dependency phpunit/phpunit to v12

| datasource | package         | from    | to     |
| ---------- | --------------- | ------- | ------ |
| packagist  | phpunit/phpunit | 10.5.26 | 12.5.2 |

Author: renovate[bot]

composer.json

@@ -21,7 +21,7 @@
         "composer/composer":        "^2.7.2",
         "doctrine/coding-standard": "^12.0.0",
         "infection/infection":      "^0.27.11",
-        "phpunit/phpunit":          "^10.5.15",
+        "phpunit/phpunit":          "^12.5.2",
         "symfony/process":          "^7.0.4"
     },
     "autoload": {