Migrate to python 3.8?

[bollwyvl]

I have no particular driver for this change, as 3.6 doesn't EOL for a good long time now, but the performance improvements might be worth it.

[bollwyvl]

Of course, for a mere double the CI cost, we could ship 3.6 and 3.8.

[datakurre]

IMO, no reason to support two Python versions with RobotLab.

[VernonCrabtree]

I have python code written on 3.8 and all my modules are installed for my 3.8 python. Now, when I try to use RobotLab I have to modify my code and reinstall all modules for 3.6 - a significant downgrade.
I don't see any reason to support an old version of Python - just upgrade to the latest. If it breaks something, let it break sooner rather than later (fail fast).

[datakurre]

I assume the next release will be Python 3.8 whenever we have time to put it together. It’s mainly about manually testing that all bundled add-on versions (and Firefox) work well together.

That said, all packages should work fine with Python 3.8, so it should be possible to manually install everything with Python 3.8 miniconda.

[bollwyvl]

Thanks for the feedback! Your use case might be more advanced than that we were/are mostly trying to do in this repo, which is support time-limited workshops. We don't have any workshops planned right now, so we're not burning to get a new release out. Will take your concerns into account on the next build.