build(deps): bump socket.io-parser and socket.io in /test/echo_server

Bumps [socket.io-parser](https://github.com/socketio/socket.io-parser) to 4.2.3 and updates ancestor dependency [socket.io](https://github.com/socketio/socket.io). These dependencies need to be updated together.


Updates `socket.io-parser` from 4.0.5 to 4.2.3
- [Release notes](https://github.com/socketio/socket.io-parser/releases)
- [Changelog](https://github.com/socketio/socket.io-parser/blob/main/CHANGELOG.md)
- [Commits](socketio/socket.io-parser@4.0.5...4.2.3)

Updates `socket.io` from 3.0.5 to 4.6.1
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/main/CHANGELOG.md)
- [Commits](socketio/socket.io@3.0.5...4.6.1)

---
updated-dependencies:
- dependency-name: socket.io-parser
  dependency-type: indirect
- dependency-name: socket.io
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

test/echo_server/package.json

@@ -3,6 +3,6 @@
     "author": "Melo Yao",
     "version": "0.0.0",
     "dependencies": {
-        "socket.io": "^3.0.5"
+        "socket.io": "^4.6.1"
     }
 }