Merge pull request #13 from php-api-clients/dependabot/composer/api-clients/test-utilities-5.4.0

Author: dependabot[bot]

composer.json

@@ -15,7 +15,7 @@
     "wyrihaximus/string-get-in": "^1.0"
   },
   "require-dev": {
-    "api-clients/test-utilities": "^5.1.0",
+    "api-clients/test-utilities": "^5.4.0",
     "guzzlehttp/psr7": "^1.3"
   },
   "autoload": {