Bump socket.io from 2.2.0 to 4.0.1 (#410)

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.2.0 to 4.0.1.
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/master/CHANGELOG.md)
- [Commits](socketio/socket.io@2.2.0...4.0.1)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -40,7 +40,7 @@
     "xmldom": "^0.1.19",
     "cbor-js": "^0.1.0",
     "webworkify": "^1.5.0",
-    "socket.io": "2.2.0"
+    "socket.io": "4.0.1"
   },
   "directories": {
     "example": "examples",