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

Author: renovate[bot]

composer.json

@@ -15,7 +15,7 @@
     "lcobucci/jwt": "^4.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "9.6.8",
+    "phpunit/phpunit": "12.2.9",
     "nyholm/nsa": "^1.3",
     "jetbrains/phpstorm-attributes": "^1.0",
     "infection/infection": "^0.26.16"