Python version support

[artofscience]

Hi there, I added a Workflow that runs the tests via python -m pytest tests/ for Python versions 3.8 and 3.9. I found we included some features that are not supported by versions < 3.8. What version do we intend to support?

[MaxvdKolk]

From 3.8 and upwards is probably fine. Most systems come with >=3.8 now I think, at least Ubuntu and MacOS. Supporting lower versions is probably not too hard, we might just need to change the f-string prints f'{variable}' and some use of the walrus operator := at some places.