[Security] Bump socket.io from 2.1.1 to 2.4.1
[Security] Bump socket.io from 2.1.1 to 2.4.1

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.1.1 to 2.4.1. **This update includes a security fix.**
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/2.4.1/CHANGELOG.md)
- [Commits](https://github.com/socketio/socket.io/compare/2.1.1...2.4.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
kaliber5/ember-window-mock,kaliber5/ember-window-mock