Drop CPython 3.6 & 3.7 on 2025-05-06

[mayeut]

CPython 3.6 reached EOL on 2021-12-23.
CPython 3.7 reached EOL on 2023-06-27.

Dropping CPython 3.6 & 3.7 will allow adding CPython 3.14 with minimal size / build time impact on images (3.14b0 is expected on 2025-05-06).

[EwoutH]

Sounds right, 3.7 is EOL over a year and 3.6 even longer. And of course current images remain available.

Are you open to PRs or would you like to do this yourself?

[mayeut]

Are you open to PRs or would you like to do this yourself?

I'm already in the process of preparing this even though it's months away. Thanks for the proposition though.