Bump ws from 8.19.0 to 8.21.0

Bumps [ws](https://github.com/websockets/ws) from 8.19.0 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.19.0...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "node-fetch": "2.6.7",
     "samsung-remote": "^1.6.0",
     "samsungtv": "https://git@github.com/luca-saggese/samsungtv",
-    "ws": "^8.19.0"
+    "ws": "^8.21.0"
   },
   "devDependencies": {
     "@alcalzone/release-script": "^5.2.1",