chore(deps): update dependency happy-dom to v18

Author: renovate[bot]

packages/livekit-server-sdk/package.json

@@ -52,7 +52,7 @@
     "@edge-runtime/vm": "^5.0.0",
     "@livekit/changesets-changelog-github": "^0.0.4",
     "@types/node": "^20.10.1",
-    "happy-dom": "^17.0.0",
+    "happy-dom": "^18.0.0",
     "prettier": "^3.0.0",
     "tsup": "^8.3.5",
     "typedoc": "^0.28.0",