Update dependency phpunit/phpunit to v12

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 11.5.8 | 12.0.4 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Diff for: composer.json

@@ -46,7 +46,7 @@
     "phpbench/phpbench": "^1.2.15",
     "phpspec/prophecy-phpunit": "^2.1.0",
     "phpstan/phpstan": "^2.1.0",
-    "phpunit/phpunit": "^11.5.7",
+    "phpunit/phpunit": "^12.0.0",
     "psalm/plugin-phpunit": "^0.19.0",
     "roave/infection-static-analysis-plugin": "^1.36.0",
     "symfony/messenger": "^5.4.31|^6.4.0|^7.0.1",