Move phpunit to require dev

Author: AydinHassan

composer.json

@@ -35,6 +35,7 @@
         "phpunit/phpunit": "^8.5"
     },
     "require-dev": {
+        "phpunit/phpunit": "^8.5",
         "composer/composer": "^2.0",
         "squizlabs/php_codesniffer": "^3.4",
         "phpstan/phpstan": "^0.12.50",