First attempt to run tests and lint #9

[monatis]

• Test it in all supported OSs and Python versions.
• Run black, and auto-commit changes if necessary.

[monatis]

Apparently it's failing because we have a dependency on private quaterion-models repo. Any suggestions? @generall @joein

[monatis]

Wow it's an issue since 2019 python-poetry/poetry#835

[generall]

let's publish on pypi first

[monatis]

Now it can run tests, but tests fail in a strange way due to a regression in setuptools. I downgraded it to 59.5.0 according to this link, but still no luck. Tests run and pass successfully on local though.