Bump socket.io from 2.1.1 to 2.5.0

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.1.1 to 2.5.0.
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/main/CHANGELOG.md)
- [Commits](https://github.com/socketio/socket.io/compare/2.1.1...2.5.0)

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

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

package.json

@@ -42,7 +42,7 @@
     "raw-loader": "^0.5.1",
     "serve-static": "^1.12.1",
     "slugify": "^1.1.0",
-    "socket.io": "2.1.1",
+    "socket.io": "2.5.0",
     "steam-workshop": "0.0.4",
     "style-loader": "0.13.1",
     "sweetalert": "^1.1.3",