build(deps): update ws requirement to ^6.0.0 (#2670)

Updates the requirements on [ws](https://github.com/websockets/ws) to permit the latest version.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](https://github.com/websockets/ws/commits/6.0.0)

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

package.json

@@ -39,7 +39,7 @@
     "pako": "^1.0.0",
     "prism-media": "hydrabolt/prism-media",
     "tweetnacl": "^1.0.0",
-    "ws": "^4.0.0"
+    "ws": "^6.0.0"
   },
   "peerDependencies": {
     "bufferutil": "^3.0.0",