Updated to Git Cop 3.0.0.
Updated to Git Cop 3.0.0.

Includes enhanced support for XDG environment variables which don't
require support of additional tools like [direnv](https://direnv.net).

[Changes](https://github.com/bkuhlmann/git-cop/releases/tag/3.0.0).

bkuhlmann/ruby_setup,bkuhlmann/ruby_setup