Bump ws from 2.3.1 to 5.2.4

Bumps [ws](https://github.com/websockets/ws) from 2.3.1 to 5.2.4.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@2.3.1...5.2.4)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: direct:production
...

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

package.json

@@ -19,7 +19,7 @@
     "sockjs": ">= 0.3.1",
     "socket.io": "2.5.0",
     "socket.io-client": "2.4.0",
-    "ws": "2.3.1",
+    "ws": "5.2.4",
     "request": ">= 2.1.1",
     "coffee-script": "1.7.0",
     "hat": "*"