Bump socket.io from 2.3.0 to 2.4.0

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.3.0 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](https://github.com/socketio/socket.io/compare/2.3.0...2.4.0)

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

package.json

@@ -45,7 +45,7 @@
   "dependencies": {
     "concurrently": "^5.1.0",
     "patch-package": "^6.2.1",
-    "socket.io": "^2.3.0"
+    "socket.io": "^2.4.0"
   },
   "devDependencies": {
     "copyfiles": "^2.2.0",