Move to GitHub actions

[samuelcolvin]

Change Summary

Move all tests to run on github actions.

This combined and extends #1293 and #1304. Thank you very much @StephenBrown2 for your work on both, they were very helpful when working on this. I decided it was easiest to start a new PR to combined results, I hope you don't mind.

[codecov]

Codecov Report

Merging #1326 into master will not change coverage by %.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1326   +/-   ##
=======================================
  Coverage   99.89%   99.89%           
=======================================
  Files          21       21           
  Lines        3725     3725           
  Branches      736      736           
=======================================
  Hits         3721     3721           
  Misses          2        2           
  Partials        2        2           

Impacted Files	Coverage Δ
pydantic/version.py	100.00% <100.00%> (ø)

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[StephenBrown2]

Happy to do the legwork to get it started, I'd imagined they'd get combined in the end anyways.

[StephenBrown2]

Not sure if it's relevant, but do you want to add or move to manylinux2014 wheels (vs manylinux2010) as well?
https://cibuildwheel.readthedocs.io/en/stable/options/#examples_4
https://www.python.org/dev/peps/pep-0599/#the-manylinux2014-policy

[samuelcolvin]

done, now builds manylinux1 and manylinux2014 binaries. Hope that is correct.