chore(deps): Update dependency phpunit/phpunit to v12

Author: renovate[bot]

composer.json

@@ -25,7 +25,7 @@
   },
   "require-dev": {
     "robinvdvleuten/ulid": "^5.0",
-    "phpunit/phpunit": "^11.0",
+    "phpunit/phpunit": "^12.0",
     "friendsofphp/php-cs-fixer": "^3.35",
     "phpstan/phpstan": "^1.10",
     "phpstan/phpstan-phpunit": "^1.3",