Bump ws from 8.20.1 to 8.21.0

Bumps [ws](https://github.com/websockets/ws) from 8.20.1 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.20.1...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

@@ -49,7 +49,7 @@
     "morphdom": "^2.7.8",
     "send": "^1.2.1",
     "urlpattern-polyfill": "^10.1.0",
-    "ws": "^8.20.1"
+    "ws": "^8.21.0"
   },
   "devDependencies": {
     "ava": "^6.4.1"