Add support for Python 3.12

[VKOPd]

Does not install under Python 3.12 per the directions on https://github.com/nabla-c0d3/sslyze -- at least on Win 11.

The directions do work under Python 3.11 which I also have.

[Jean-Luc Duprat]

Same issue on Fedora 39 which comes with Python 3.12.

[Alban Diquet]

Fixed in v6.0.0.

[Ansl55555]

Gleiches Problem auf Fedora 39, das mit Python 3.12. geliefert wird.ucker F