Update dependency wyrihaximus/async-test-utilities to v8

Author: renovate[bot]

composer.json

@@ -34,7 +34,7 @@
         "ringcentral/psr7": "^1.3",
         "symfony/yaml": "^6.0",
         "twig/twig": "^3.5",
-        "wyrihaximus/async-test-utilities": "^7.0",
+        "wyrihaximus/async-test-utilities": "^7.0 || ^8.0",
         "wyrihaximus/composer-update-bin-autoload-path": "^1",
         "wyrihaximus/react-awaitable-observable": "^1.0",
         "wyrihaximus/simple-twig": "^2.1",