Update composer.json

Author: mbardelmeijer

composer.json

@@ -21,7 +21,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.6",
         "mockery/mockery": "^1.5",
-        "orchestra/testbench": "^v8.0.0",
+        "orchestra/testbench": "^8.0",
         "phpunit/phpunit": "^9.6"
     },
     "config": {