Dropping Python 3.9 support moving forward

[thomas-bc]

Hello,

I just wanted to call out that with #4906 merged, we've now dropped official support for Python 3.9. Meaning F´ v4.3.0 will only support Python 3.10+

This is because Python 3.9 was end-of-lifed in 2025 and a lot of our dependencies have dropped support as well.

Somehow Python3.9 seemed like one of these versions where it feels significant enough to be announced... maybe it's not.

Cheers!

[celskeggs]

That's very significant and will force my team to update our version of Python. Thanks for announcing it.

[kevin-f-ortega]

This is good to know. Thank you!