slack api updates?

[grimmy]

We got a tip in #pidgin on libera today that slack now requires a cookie to be sent with the websocket connection, so I'm just forwarding that here :)

(03:07:35 AM) cwegener: just leaving this here in case anyone is using the slack-libpurple plugin. slack API changed today which potentially requires code changes in the API client. wee-slack/wee-slack@c303a77

This has been fixed on the 2FA credentials branch. Originally I thought this patch (the last one) could be cherry-picked to the main branch, but it looks like it might require the whole branch due to the dependency on the cookie field.