Update dependency wyrihaximus/async-test-utilities to ^9.4.2

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

composer.json

@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "react-parallel/stubs": "^1.2",
-        "wyrihaximus/async-test-utilities": "^9.3.0",
+        "wyrihaximus/async-test-utilities": "^9.4.2",
         "wyrihaximus/makefiles": "^0.5.0",
         "wyrihaximus/ticking-promise": "^3.1.0"
     },