Bump ws from 7.5.7 to 7.5.10 in /testapp

Bumps [ws](https://github.com/websockets/ws) from 7.5.7 to 7.5.10.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.5.7...7.5.10)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: indirect
...

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

Author: dependabot[bot]