Fix tests for Python 3.12: remove "imp", fixes #21, #44

[sbraz]

Hi, This patch is required for tests to pass with Python 3.12, along with 5259bcbe3434c6974f7a65cc435dd0b4cfc3f864.

The "imp" module was removed in Python 3.12. The replacement functions were added in Python 3.5, see https://docs.python.org/3/library/importlib.html#importlib.util.spec_from_file_location https://docs.python.org/3/library/importlib.html#importlib.util.module_from_spec

[lxp]

Thanks for your pull request! I will have a look at it, after fixing the CI pipeline.

[lxp]

Your changes look good, although I have not tested it yet. The CI pipeline is fixed, but it is not used in your PR yet. Could you please rebase your changes?

[sbraz]

@lxp done, sorry about the mess, I got confused because of the unusual target branch name :D

[lxp]

Thank you!