Update composer.json

Author: richan-fongdasen

composer.json

@@ -37,7 +37,7 @@
         "fakerphp/faker": "^1.9",
         "mockery/mockery": "^1.4",
         "larastan/larastan": "^1.0|^2.0",
-        "orchestra/testbench": "^6.0|^7.0|^8.0|9.x-dev",
+        "orchestra/testbench": "^6.0|^7.0|^8.0|^9.0",
         "phpmd/phpmd": "^2.11",
         "phpstan/phpstan-deprecation-rules": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.0",