[Request] Add keybase

[jwhipp]

https://keybase.io/

Keybase is an encrypted chat application that is free and opensource. I feel like it'd be useful to have in a bucket if possible.

Code Repo: https://github.com/keybase/client

Installation Information: https://keybase.io/docs/the_app/install_windows

[rasa]

It’s certainly possible but I’m almost certain it will require admin rights.

[AlJohri]

This worked for me with no admin rights: https://github.com/AlJohri/scoop-personal/blob/master/keybase.json

[pratikpc]

https://github.com/ScoopInstaller/Extras/pull/3494

Looks like there were some issues