Merge pull request #58 from reactphp-parallel/renovate/phpunit

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

Author: WyriHaximus

composer.json

@@ -18,7 +18,7 @@
   },
   "require-dev": {
     "react-parallel/stubs": "^1.2",
-    "wyrihaximus/async-test-utilities": "^10.2.0",
+    "wyrihaximus/async-test-utilities": "^10.3.0",
     "wyrihaximus/makefiles": "^0.6.0",
     "wyrihaximus/ticking-promise": "^3.1.0"
   },