Bump engine.io and socket.io

Bumps [engine.io](https://github.com/socketio/engine.io) to 3.6.1 and updates ancestor dependency [socket.io](https://github.com/socketio/socket.io). These dependencies need to be updated together.


Updates `engine.io` from 3.5.0 to 3.6.1
- [Release notes](https://github.com/socketio/engine.io/releases)
- [Changelog](https://github.com/socketio/engine.io/blob/main/CHANGELOG.md)
- [Commits](socketio/engine.io@3.5.0...3.6.1)

Updates `socket.io` from 2.4.0 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](socketio/socket.io@2.4.0...2.5.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

AY 2019-2020/Student Works/astukis/Project/ISaidIt/ISaidItExpress/ISaidItExpress/package.json

@@ -17,7 +17,7 @@
     "debug": "^2.2.0",
     "express": "^4.14.0",
     "pug": "^3.0.1",
-    "socket.io": "^2.4.0"
+    "socket.io": "^2.5.0"
   },
   "devDependencies": {
     "@types/debug": "0.0.30",