Update dependency phpunit/phpunit to v12

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 11.5.6 | 12.0.1 |

Author: renovate[bot]

composer.json

@@ -36,7 +36,7 @@
     "require-dev": {
         "doctrine/coding-standard": "^12.0",
         "laminas/laminas-servicemanager": "^3.23.0 || ^4.3.0",
-        "phpunit/phpunit": "^11.5.5",
+        "phpunit/phpunit": "^12.0.0",
         "psalm/plugin-phpunit": "^0.19.2",
         "roave/security-advisories": "dev-latest",
         "vimeo/psalm": "^6.0.0"