Drop support for Stylus

[epergo]

Contributes to #1690

stylus hasn't been maintained for a long time. Support for stylus will be dropped in the next major version upgrade.

[zzak]

@epergo I'm thinking we should start a branch called unstable or something that we can start making 3.x PRs against. 🤔

[epergo]

@epergo I'm thinking we should start a branch called unstable or something that we can start making 3.x PRs against. 🤔

It makes sense, if not we are going to have a lot PRs piled up until we decide to start merging them. Another alternative could be having branches per stable releases and treat master like edge (like I think Rails does), but I guess that is more cumbersome for maintainers so whatever works for you 😄

[zzak]

@epergo The reason I want to avoid merging many unreleased changes to main is that releases in the past have been slow and I know some people are just using github "sinatra/sinatra" in their Gemfiles.

[epergo]

Sounds good to me! As soon as we have the unstable branch I'll update the PR

[epergo]

@zzak I changed the target branch to unstable do you think we can merge this?