Update dependency phpunit/phpunit to v13

Author: renovate[bot]

composer.json

@@ -18,7 +18,7 @@
   "require-dev": {
     "doctrine/coding-standard": "^14.0",
     "phpstan/phpstan": "^2.1.50",
-    "phpunit/phpunit": "^12.5.6"
+    "phpunit/phpunit": "^13.0.0"
   },
   "autoload": {
     "psr-4": {