fix(deps): update dependency engine.io-client to v3.4.0

Author: renovate-bot

package-lock.json

@@ -50,7 +50,7 @@
     "cli-color": "1.4.0",
     "connect": "3.7.0",
     "cors": "2.8.5",
-    "engine.io-client": "3.3.2",
+    "engine.io-client": "3.4.0",
     "express": "4.17.1",
     "fast-json-stringify": "1.15.4",
     "fast-safe-stringify": "2.0.7",