[LyX/ next] Prepare the removal of Python 2 support

[Richard Kimberly Heck]

On 5/30/24 11:58, José Matos wrote:
> Assuming that the next development cycle takes 2.5 years this will be a
> version that will be 5 years old by then and so it should be widely
> available.

I'm hopeful the next one will not take quite that long.

> In this particular case the reason to jump directly to 3.10 is the
> structural pattern matching:
>
> https://docs.python.org/3/whatsnew/3.10.html#pep-634-structural-pattern-matching
>
> FWIW notice that this is a lot more powerful than the usual C/C++
> switch.

This does look powerful. But it's unclear to me whether it's worth 
requiring. I don't have a strong view.

Riki