Future-proofing

[orta]

In an upcoming version of Danger, I'm going to be adding linting to the plugin - specifically because I'll be building a website for all plugins. You can see the idea here: danger/danger#223

Effectively, you just need to add some description bits and pieces to the docs for the class: https://github.com/dbgrandi/danger-proselint/blob/master/lib/danger_plugin.rb#L3-L17

( I'm still figuring the exacts there, but it'll probably be after WWDC now )