Add Github Actions

[Laerte]

I pinned the setuptools version to 57.5.0, because 58.0.0 have a breaking change:

• 2086: Removed support for 2to3 during builds. Projects should port to a unified codebase or pin to an older version of Setuptools using PEP 518 build-requires.

That make funcparserlib dependency not work because it use use_2to3.

Changed the CIRCLE_CI env to CI that is the variable that Github Actions use.

Used a dirty hack in order to make TTY work. Explanation here

For some unknown reason i could not make it Codecov work in my tests.

I also have the action to publish image to docker repository but i not add to this PR (But i can if is needed).

[Gallaecio]

I think the codecov issue is because .git does not get included into the image. Maybe it can be mounted as a Docker volume? Or maybe the whole source should be mounted as a volume, and codecov be called from outside the Docker image, as a GitHub Actions step.

[Laerte]

@Gallaecio Yeah, I indeed passed the .git folder via volume arg but i get the error

Error: Could not determine repo and owner

But the flow itself its working.

[wRAR]

Thank you!