chore(deps): bump ws, engine.io and socket.io-adapter in /demo (#187)

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

Updates `ws` from 8.17.0 to 8.17.1
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.17.0...8.17.1)

Updates `engine.io` from 6.5.4 to 6.5.5
- [Release notes](https://github.com/socketio/engine.io/releases)
- [Changelog](https://github.com/socketio/engine.io/blob/6.5.5/CHANGELOG.md)
- [Commits](socketio/engine.io@6.5.4...6.5.5)

Updates `socket.io-adapter` from 2.5.2 to 2.5.5
- [Release notes](https://github.com/socketio/socket.io-adapter/releases)
- [Changelog](https://github.com/socketio/socket.io-adapter/blob/2.5.5/CHANGELOG.md)
- [Commits](socketio/socket.io-adapter@2.5.2...2.5.5)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: indirect
- dependency-name: engine.io
  dependency-type: indirect
- dependency-name: socket.io-adapter
  dependency-type: indirect
...

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Author: dependabot[bot]