update: package version

Author: [email protected]

composer.json

@@ -8,7 +8,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^9.3.9",
-        "orchestra/testbench": "^6.0.0",
+        "orchestra/testbench": "^6.15.1",
         "laravel/legacy-factories": "^1.0.4"
     },
     "license": "MIT",