This moves CI from Travis and AppVeyor to GitHub Actions. Unfortunately, Travis has significantly reduced the amount of resources available to open source projects. In this PR, I've also reduced the number of build jobs as I don't think there's a lot of benefit from testing on 32bit and 64bit versions of the same image (please correct me if I'm wrong). Also note that 32bit is no longer supported on recent versions of macOS.
This moves CI from Travis and AppVeyor to GitHub Actions. Unfortunately, Travis has significantly reduced the amount of resources available to open source projects. In this PR, I've also reduced the number of build jobs as I don't think there's a lot of benefit from testing on 32bit and 64bit versions of the same image (please correct me if I'm wrong). Also note that 32bit is no longer supported on recent versions of macOS.
Here's the first successful run: https://github.com/hpi-swa/Squot/actions/runs/477115886
Best regards, Fabio