Bump ws and engine.io-client in /frontend (#30)

Bumps [ws](https://github.com/websockets/ws) and [engine.io-client](https://github.com/socketio/socket.io). These dependencies needed to be updated together.

Updates `ws` from 8.18.3 to 8.20.1
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.18.3...8.20.1)

Updates `engine.io-client` from 6.6.4 to 6.6.5
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/main/CHANGELOG.md)
- [Commits](https://github.com/socketio/socket.io/compare/engine.io-client@6.6.4...engine.io-client@6.6.5)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.20.1
  dependency-type: indirect
- dependency-name: engine.io-client
  dependency-version: 6.6.5
  dependency-type: indirect
...

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