Abandon ruby 19

[rumpelsepp]

Ruby 1.9 is dead!
Ruby 2.2 is out there, so let's adjust travis ci!

[onebree]

Would this affect the user of the library if they have Ruby 1.9?

[jneen]

@onebree hopefully not! it just means we don't run tests on 1.9 anymore, so i can't guarantee that it won't break in the future.

[jneen]

that said, I don't think we're using any 2.0-specific features, so I don't see why you wouldn't be able to use it anyways.

[mojavelinux]

I agree with the addition of Ruby 2.2 to the Travis CI build, but I don't see a reason to drop 1.9.3 until there's a compelling reason to code against the Ruby 2 APIs. Rouge is a pretty fundamental library, so we want to be sure that no downstream programs still have a Ruby 1.9.3 requirement. Otherwise Rouge forces that decision, which I don't think is appropriate. I'm still seeing lots of machines with Ruby 1.9.3 these days, so it may not be supported, but it's not dead yet.

[rumpelsepp]

I had splitted my pull request into two commits; so maybe @jneen could apply only this patch.

[jneen]

I ended up doing this manually. Thanks!

[jneen]

(to clarify: still supporting 1.9.3, but also testing 2.2)

[rumpelsepp]

👍

[mojavelinux]

👍