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

Author: renovate[bot]

composer.json

@@ -12,7 +12,7 @@
   "require": {},
   "require-dev": {
     "codedungeon/phpunit-result-printer": "0.32.0",
-    "phpunit/phpunit": "9.5.21",
+    "phpunit/phpunit": "12.0.6",
     "spatie/phpunit-watcher": "1.23.2"
   },
   "autoload": {