Merge pull request #64 from Musare/dependabot/npm_and_yarn/backend/socket.io-2.4.0

chore(deps): bump socket.io from 2.3.0 to 2.4.0 in /backend

backend/package.json

@@ -30,7 +30,7 @@
     "redis": "^2.8.0",
     "request": "^2.88.0",
     "sha256": "^0.2.0",
-    "socket.io": "^2.2.0",
+    "socket.io": "^2.4.0",
     "underscore": "^1.10.2"
   },
   "devDependencies": {