Bump socket.io from 2.2.0 to 2.4.0

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.2.0 to 2.4.0.
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/2.4.0/CHANGELOG.md)
- [Commits](socketio/socket.io@2.2.0...2.4.0)

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

Author: dependabot[bot]

package-lock.json

@@ -310,7 +310,7 @@
         "react-dom": "^16.9.0",
         "react-intl": "^3.1.9",
         "react-test-renderer": "^16.9.0",
-        "socket.io": "^2.2.0",
+        "socket.io": "^2.4.0",
         "svg-inline-react": "^3.1.0",
         "ts-jest": "^25.0.0",
         "usb-native": "^5.0.1",