chore: bump engine.io to version 6.2.1

In order to fix CVE-2022-41940.

See also: GHSA-r7qp-cfhv-p84w

Author: darrachequesne

package-lock.json

@@ -49,7 +49,7 @@
     "accepts": "~1.3.4",
     "base64id": "~2.0.0",
     "debug": "~4.3.2",
-    "engine.io": "~6.2.0",
+    "engine.io": "~6.2.1",
     "socket.io-adapter": "~2.4.0",
     "socket.io-parser": "~4.2.1"
   },