chore: drop python 3.7 for cibuildwheel driver

[mayeut]

This drops python 3.7 for cibuildwheel.
Building python 3.6 / 3.7 packages is still supported.

[henryiii]

This is a week early, but it makes sense to do with a minor point bump, which #1525 requires too, so doing them together makes sense.

[henryiii]

Could you bump ruff too? Maybe I can from my phone, actually…

[joerick]

Lovely stuff, thank you @mayeut. Let's just hold on merging this for a few days in case we need to get a patch release out in the meantime.

[henryiii]

3.7's EoL is today.

[henryiii]

FYI, the markdown-it-py cap below can be removed, it was there to support Python 3.7.

[mayeut]

I'd rather be explicit here if it's OK.

[henryiii]

I mean “markdown-it-py<3” can be removed. I can’t comment on the correct line.

[mayeut]

ok, I misunderstood completely.
will do

[henryiii]

I'll probably retry #1297 after this goes in.

[henryiii]

for a few days

It's been three weeks. I'd like to get something out before SciPy next week.

[joerick]

My apologies, I was holding out for a minor release but had forgotten that #1525 went in a couple of weeks back.

(I wasn't too happy with this being the only reason for a minor version bump)