Bump ws and socket.io in /packages/web-component-tester

Bumps [ws](https://github.com/websockets/ws) to 7.5.10 and updates ancestor dependency [socket.io](https://github.com/socketio/socket.io). These dependencies need to be updated together.


Updates `ws` from 7.4.6 to 7.5.10
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.4.6...7.5.10)

Updates `socket.io` from 2.4.0 to 2.5.1
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/2.5.1/CHANGELOG.md)
- [Commits](socketio/socket.io@2.4.0...2.5.1)

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

Signed-off-by: dependabot[bot] <[email protected]>