Bump api-clients/test-utilities from 4.3.0 to 5.1.0

Bumps [api-clients/test-utilities](https://github.com/php-api-clients/test-utilities) from 4.3.0 to 5.1.0.
- [Release notes](https://github.com/php-api-clients/test-utilities/releases)
- [Commits](php-api-clients/test-utilities@4.3.0...5.1.0)

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

Author: dependabot-support

composer.json

@@ -13,7 +13,7 @@
     "friendsofphp/php-cs-fixer": "^2.5"
   },
   "require-dev": {
-    "api-clients/test-utilities": "^4.3"
+    "api-clients/test-utilities": "^5.1"
   },
   "config": {
     "platform": {