Add Support for Python 3.11

[AnesBenmerzoug]

We should add support to Python 3.11 which was released on the 24th October 2022.

It should be stable enough by now and our dependencies should have added support for it too.

• Make sure that dependencies support the new python version.
• Add new version to CI jobs
• Add new version classifier to setup.py

[mdbenito]

If we add another python version to the test matrix, CI is going to take foorreeeeeveeerrrrr 😴😴 It's already bad enough, so maybe we should pospone until 3.8 reaches EOL on Oct 14th, 2024, or we simplify the tests, or we get runners with more cores.