Updated test-utilities to latest version

Author: WyriHaximus

composer.json

@@ -25,7 +25,7 @@
     "wyrihaximus/ticking-promise": "^1.6"
   },
   "require-dev": {
-    "api-clients/test-utilities": "^2.0",
+    "api-clients/test-utilities": "^3.0.1",
     "php-di/php-di": "^5.4"
   },
   "suggest": {