Bump ws from 7.2.1 to 7.2.2 in /tests (#34)

Bumps [ws](https://github.com/websockets/ws) from 7.2.1 to 7.2.2.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.2.1...7.2.2)

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