Use Github Actions for building Wheels and not Travis

[naveen521kk]

This PR is:

• continuation of Build Windows wheels #191
• Fixes Provide Windows Wheels #19
• Builds and test windows wheels using Github Actions
• Revert .travis.yml to how it was originally.
• Uploads as Artifact after each build

TODO:

• Correct it to upload to releases.

cc
@stuaxo

[stuaxo]

I'll test the WHLs this evening (BST), with a view to giving a +1 to releasing them.

[naveen521kk]

Atleast we can this as whole without follow up PR @stuaxo

[naveen521kk]

The logic for uploading release is weird for me. What would you like to do? Like tell me the workflow how you want it to be? @stuaxo and @lazka
Also, is the release ready? @stuaxo

[stuaxo]

Also, is the release ready? @stuaxo

Yeah, I think we can release the WHLs generated here, are good
https://github.com/naveen521kk/pycairo/actions/runs/234172269

I tested one on a fresh python install (that had never compiled pycairo), to be sure + all the tests pass.

The logic for uploading release is weird for me. What would you like to do? Like tell me the workflow how you want it to be? @stuaxo and @lazka

These are good questions, I don't have answers without having some time to think + learn a bit more about workflows, maybe @lazka has some ideas.

If we move to actions, we should aim not to add too much complexity, adhering to DRY if possible.

This github actions example from cibuildwheel is pretty minimal + in a declarative style.
https://www.fromkk.com/posts/using-cibuildwheel-to-create-python-wheels/

[naveen521kk]

@lazka so can you or @lazka can release the wheels in PyPi?

[lazka]

GHA is much better, thanks!

[naveen521kk]

@lazka Can you upload the wheels to PyPI?

[lazka]

@naveen521kk I'll do it for the next release. ok?

[naveen521kk]

I think it would be good if you do for this release itself( Many are in need of it) . Just upload it and PyPi handles it. But yes you would need to run actions by changing the version in setup.py to 19.1.
If you could tell many when next release it would be good if you couldn't upload for this one.