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

Author: alma-renovate-bot[bot]

composer.json

@@ -14,7 +14,7 @@
   "require-dev": {
     "dealerdirect/phpcodesniffer-composer-installer": "^1.0.0",
     "phpcompatibility/php-compatibility": "^9.0",
-    "phpunit/phpunit": "^5 || ^6 || ^7 || ^8 || ^9 || ^10 || ^11",
+    "phpunit/phpunit": "^5 || ^6 || ^7 || ^8 || ^9 || ^10 || ^11 || ^12",
     "roave/security-advisories": "@dev",
     "squizlabs/php_codesniffer": "^3.3",
     "mockery/mockery": "^1.3"