pyproject: support Python 3.15

[mathstuf]

Fedora 45 is already starting to build with it.

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Can be deferred to whenever it is wanted; I'm mostly making sure that it's actually OK here before blindly updating constraints in the Fedora package.

[mathstuf]

Ok, well then. Seems something is broken on 3.15 then.

[rosset]

khal-0.14.0-python3.15-strptime.patch
@mathstuf @WhyNotHugo could you please check if this patch address the fix for py3.15 ?

[mathstuf]

Looks reasonable for Fedora. Not sure what makes sense to actually merge as a long-term fix. Testing it here in the meantime.

I do have edge-case worries about things like %e %%yolo in the format string being a false-positive, but…highly unlikely.

[rosset]

Looks reasonable for Fedora. Not sure what makes sense to actually merge as a long-term fix. Testing it here in the meantime.

I do have edge-case worries about things like %e %%yolo in the format string being a false-positive, but…highly unlikely.

thanks @mathstuf

@WhyNotHugo can you please review if this patch make sense to be merge to the master branch ?

For now we will use this patch to fix 0.14.0 build on Fedora rawhide (development)

thanks guys.