Allow PHPUnit 12

Author: Jean85

composer.json

@@ -14,7 +14,7 @@
     "require": {
         "php": "^7.3 || ^8",
         "phpspec/prophecy": "^1.18",
-        "phpunit/phpunit":"^9.1 || ^10.1 || ^11.0"
+        "phpunit/phpunit":"^9.1 || ^10.1 || ^11.0 || ^12.0"
     },
     "autoload": {
         "psr-4": {