Update dependency phpunit/phpunit to v12

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 9.6.10 | 12.1.3 |

Author: renovate[bot]

composer.json

@@ -19,7 +19,7 @@
         "php": "~8.0.0 || ~8.1.0 || ~8.2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6.7",
+        "phpunit/phpunit": "^12.1.3",
         "infection/infection": "^0.26.19"
     },
     "autoload": {