chore: allow phpunit 11 (#53)

Author: Chris53897

composer.json

@@ -15,7 +15,7 @@
         "symfony/validator": ">=4.4.40"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6 || ^10.1"
+        "phpunit/phpunit": "^9.6 || ^10.5 || ^11.0.3"
     },
     "autoload": {
         "psr-4": {