Create python-package.yml

[arteymix]

TODO

• include staging and development servers in the build matrix (no need to run it on every Python version)

[arteymix]

@oganm I fixed test_all.py, but I think test_tut.py needs to be rewritten. Do you have some time to do that?

[oganm]

Will have to replace both test_all.py and test_tut.py after the changes in the tables branch so I wouldn't worry about either for now. The updated tests are here here

[oganm]

As far as I can see i just need to change unittest with pytest?

[arteymix]

pytest can run tests written with unittest.

In any case, I think using parametrized tests is good for testing all possible methods.

[oganm]

Tests are re-implemented using the action from here