Bump socket.io-client from 2.3.0 to 4.0.0

Bumps [socket.io-client](https://github.com/socketio/socket.io-client) from 2.3.0 to 4.0.0.
- [Release notes](https://github.com/socketio/socket.io-client/releases)
- [Changelog](https://github.com/socketio/socket.io-client/blob/master/CHANGELOG.md)
- [Commits](socketio/socket.io-client@2.3.0...4.0.0)

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

Author: dependabot-preview[bot]