Bump api-clients/test-utilities from 3.0.1 to 5.1.0

Bumps [api-clients/test-utilities](https://github.com/php-api-clients/test-utilities) from 3.0.1 to 5.1.0.
- [Release notes](https://github.com/php-api-clients/test-utilities/releases)
- [Commits](php-api-clients/test-utilities@3.0.1...5.1.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

composer.json

@@ -13,7 +13,7 @@
     "psr/http-message": "^1.0"
   },
   "require-dev": {
-    "api-clients/test-utilities": "^3.0.1",
+    "api-clients/test-utilities": "^5.1.0",
     "ringcentral/psr7": "^1.2"
   },
   "autoload": {