Update ws requirement from 6.1.2 to 6.1.3 (#4027)

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/6.1.3

)

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