Makes NearPy compatible with Python 3.7, 3.8, 3.9, and 3.10 + updates dependencies to the most recent versions supported by all 4 Python versions

[mikulskibartosz]

When you merge this PR, it will also add Github Actions that run the tests, examples, and experiments code. Like this: https://github.com/mikulskibartosz/NearPy/actions/runs/3742057468

[pixelogik]

Thanks for the work @mikulskibartosz ! Let's discuss the open questions first before we merge.