Bump ws from 6.2.1 to 7.4.6

Bumps [ws](https://github.com/websockets/ws) from 6.2.1 to 7.4.6.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@6.2.1...7.4.6)

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

package.json

@@ -28,7 +28,7 @@
     "@stomp/stompjs": "^5.2.0",
     "axios": "^0.21.1",
     "express": "^4.16.4",
-    "ws": "^6.1.3"
+    "ws": "^7.4.6"
   },
   "keywords": [
     "cisco",