Test workflows PoC

[iakovts]

(#19)
With these changes, a github Action will run on any push to the repo, triggering unit tests. This can be modified to run only on selected branches, PRs etc.
I 've also split the dev dependencies into: dev, docs and test to avoid the added overhead of packages not needed for testing (now that i think about it, pip install . && pip install pytest would be good at this stage too).

[flaport]

That's awesome!

I'd like to merge as is, but now that you're working on this (and only if it's not too difficult/time consuming).... would it be possible to add an action to release a wheel when I push a tagged commit (and when all test succeed)?

that's something I wanted for a while already, so now that there is someone with github actions knowledge I grab my chance 😅

[flaport]

merging this already as discussed in #19 , we can create new PRs for further additions to gitlab-ci.