Should we add Rubocop?

[vlado]

There are lot of us now and Rubocop could save time when reviewing PRs. I hope this will not turn into which rules to use war :)

[vfonic]

Let's add it and setup CI.

We should pick some config and just stick to it.
If anyone has a really good reason to add/change/remove a rule, then let's hear it.

I don't see anyone complaining about using Bulma. I'm ok if you just pick one config and we stick to it from now on.

[shime]

Closed by 61d9426.

This config shouldn't be too strict.