Update dependency phpunit/phpunit to v12

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 11.5.7 | 12.0.1 |


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

composer.json

@@ -37,7 +37,7 @@
     "phpstan/extension-installer": "^1.4.3",
     "phpstan/phpstan": "^1.12.17",
     "phpstan/phpstan-mockery": "^1.1.3",
-    "phpunit/phpunit": "^11.5.7",
+    "phpunit/phpunit": "^12.0.1",
     "rector/rector": "^1.2.10",
     "roave/security-advisories": "dev-latest",
     "symfony/var-dumper": "^7.0.10 || ^7.1.3",