feat: Add Python 3.11 to the testing

[cclauss]

Fixes

A short description of what this PR does.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [x] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [ ] I have read the Contribution Guidelines and my PR follows them
• [ ] I have titled the PR appropriately
• [x] I have updated my branch with the main branch
• [x] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added the necessary documentation about the functionality in the appropriate .md file
• [ ] I have added inline documentation to the code I modified

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[sk-]

@cclauss do you have plans to continue this PR?

It would also be good to add Python 3.11 to the list of classifiers.

The CI is failing because the name of the PR is not following conventional commits (this is the action checking that).

[cclauss]

I was worried to touch the classifiers because python_requires says no Py34 and the classifiers say yes Py34 when in fact no one uses Py34 anymore. https://devguide.python.org/versions

OK. This linter seems happy...

[sk-]

But we are still waiting for an approval from maintainers to be able to run the tests. @childish-sambino could you grant permissions.