Update CI

[ashie]

• GNU/Linux: Migrate to GitHub Actions
• Windows: Stay on AppVeyor, just update Ruby versions
  • Don't migrate to GitHub Actions for now because it seems much heavy than appveyor to fork a process so that it's hard to adjust some fixed timeout values for some tests.

[ashie]

See https://github.com/ashie/serverengine/pull/3 for test results.

[repeatedly]

appveyor seems to use ruby 1.9.3 on all matrix.

[ashie]

appveyor seems to use ruby 1.9.3 on all matrix.

The same branch works correctly on my forked repository:

• https://github.com/ashie/serverengine/pull/3
• https://ci.appveyor.com/project/ashie/serverengine/builds/37831708

I'm not sure why but it's not triggered correctly on this PR.

[repeatedly]

Hmm... I see. Merged for testing.

[ashie]

Hmm, still failed ...

[repeatedly]

ruby 3.0 and ruby 2.7 tests use ruby 1.9 but others use correct version.

[ashie]

Now I've found the cause. image: Visual Studio 2019 should be added: https://www.appveyor.com/docs/windows-images-software/#ruby If it's omitted, the image when the project is created is used.

[repeatedly]

I changed project setting to use "Vistual Studio 2019". If next commit doesn't change the build image, we need to update appveyor.yml.

[ashie]

If next commit doesn't change the build image, we need to update appveyor.yml.

I've created #111 since the next commit doesn't take effect.