Move to GitHub Actions CI

[rejuvyesh]

travis.org is going away. Also IME GitHub Actions CI is much faster as well. More importantly it is way more flexible and we can setup integration and bechmarks tests using something like https://github.com/tkf/Run.jl as is done in https://github.com/JuliaFolds/Transducers.jl/tree/master/.github/workflows/ for example.

[lassepe]

I'm in favor of GitHub Actions, especially for the speed. I think the workflows that are enabled by Run.jl would also work on travis, wouldn't they? Maybe I don't really understand what this package does. Doesn't it just enable a shared environment for some extra dependencies? I have looked at its README a couple of times in the past and I never really understood how this is different from just using the normal test facility supported by Pkg.

[rejuvyesh]

Oh, I agree Run.jl by itself is not necessary. Was just pointing at an example!

[zsunberg]

I have added Github CI on all the repos, but I haven't disabled travis or removed the badges yet.

[zsunberg]

I'm going to close this and open another issue for removing the old stuff