⬆️ Bump websocket-client from 1.6.3 to 1.6.4

Bumps [websocket-client](https://github.com/websocket-client/websocket-client) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/websocket-client/websocket-client/releases)
- [Changelog](https://github.com/websocket-client/websocket-client/blob/master/ChangeLog)
- [Commits](websocket-client/websocket-client@v1.6.3...v1.6.4)

---
updated-dependencies:
- dependency-name: websocket-client
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -13,4 +13,4 @@ requests-oauthlib==1.3.1
 rsa==4.9
 six==1.16.0
 urllib3>=1.24.2
-websocket-client==1.6.3
+websocket-client==1.6.4