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

Author: renovate[bot]

composer.json

@@ -8,7 +8,7 @@
     "require-dev": {
         "codelicia/xulieta": "^1.0.0",
         "doctrine/coding-standard": "^12.0.0",
-        "phpunit/phpunit": "^10.0"
+        "phpunit/phpunit": "^12.0"
     },
     "autoload": {
         "psr-4": {