There's a merged pull request on the void-packages repository

wee-slack: fix wrong dependency
https://github.com/void-linux/void-packages/pull/15899

Description:
The current `python-websockets-client` dependency is incorrect:
```
│14:56:15     | python: stdout/stderr (?): Traceback (most recent call last):
│14:56:15     | python: stdout/stderr (?):   File "/home/caio/.weechat/python/autoload/wee_slack.py", line 28, in <module>
│14:56:15     | python: stdout/stderr (?):     from websocket import ABNF, create_connection, WebSocketConnectionClosedException
│14:56:15     | python: stdout/stderr (?): ModuleNotFoundError: No module named 'websocket'
│14:56:15 =!= | python: unable to parse file "/home/caio/.weechat/python/autoload/wee_slack.py"
```
Changing it to `python3-websockets-client` fixes the issue.