Please stop supporting legacy out of support Python2

[duaneking]

Python 2 is no longer maintained and is considered very insecure/bad to be used in new systems.

By supporting it, you're advocating to mostly non technical people that they should be using noncompliant systems that put their systems and members at risk, and asking the technical people who know better to suffer attempting to do so.

It's best for Patreon and the people that support it, as well as their members, that this only support a modern python 3 release as everything python related that is still supported has already migrated to python3 fully.

This would also simplify the setup and stop people from having as many installation issues, in turn lowing costs for patreon to support it.