Use Github Actions

[abitrolly]

Right now tests fail.

flake8 complains

Run # stop the build if there are Python syntax errors or undefined names
./benchmarks/bench_sorting.py:65:9: F821 undefined name 'sort'
        sort(dummy)
        ^
./benchmarks/bench_sorting.py:66:9: F821 undefined name 'argsort'
        argsort(dummy)
        ^

asv complains too.

· No information stored about machine 'fv-az167-7'. I know about nothing.

[abitrolly]

@esc can we merge the GitHub Actions part even if there is are no tests fixes yet?

[esc]

@esc can we merge the GitHub Actions part even if there is are no tests fixes yet?

I'll put it on my list of things to do, but it may be some months until I get around to it. Thank you for your patience.