bump max python version to 3.12x

[fccoelho]

default python version in many Linux distros are now 3.12.x. So to stay compatible we need a release that can be installed on this version.

[turicas]

Should just change pyproject.toml or force this version on the provided Dockerfile also (it does not seem to specify any Python version AFAIK)?

[fccoelho]

Sure, we just need to double check if all dependencies are ok with the most recent version of Python, and then cut a release. It would be nice to finish issues 191 and 195 befor a new release, tough.