[META] Adds official support for Python 3.10

[HorlogeSkynet]

Reason and / or context

Python 3.10 is out, we should test Archey against it.

How has this been tested ?

Thanks to CI, one day, maybe.

~~:warning: Build is currently broken due to one of Pylint's depedencies.
lazy-object-proxy requires a Wheel to be built, but due to pypa/wheel#354 (see also pypa/packaging#308 & https://bugs.python.org/issue40747), the operation fails.
Currently keeping this PR as draft while waiting for the fix (python/cpython#20333 or python/cpython#22858) to be accepted.~~

Pylint and Pyinstaller have been disabled in CI though (not yet compatible).

Types of changes :

• Bug fix (non-breaking change which fixes an issue)
• Typo / style fix (non-breaking change which improves readability)
• [X] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist :

• [IF NEEDED] I have updated the README.md file accordingly ;
• [IF NEEDED] I have updated the test cases (which pass) accordingly ;
• [X] My changes looks good ;
• [X] I agree that my code may be modified in the future ;
• [X] My code follows the code style of this project (PEP8).