Test installation of the generated package in a GitHub Action

[fdiblen]

We should add build workflow which will test the installation of the generated package.

See:
tests/test_project.py::test_install
tests/test_project.py::test_project

[jspaaks]

I think this can be closed now that PR #185 has been merged

[fdiblen]

This was indeed fixed by #185. I am closing the issue.