Update dependency wyrihaximus/async-test-utilities to ^10.3.0

Author: reactphp-parallel-renovate-runner[bot]

composer.json

@@ -20,7 +20,7 @@
   "require-dev": {
     "react-parallel/stubs": "^1.2",
     "react/promise-timer": "^1.11",
-    "wyrihaximus/async-test-utilities": "^10.2.0",
+    "wyrihaximus/async-test-utilities": "^10.3.0",
     "wyrihaximus/makefiles": "^0.7.5"
   },
   "autoload": {