Python 3.13 support

[nsoranzo]

I was trying to add Python 3.13 support to Galaxy in galaxyproject/galaxy#18449 and most of our tests fail because there is no schema-salad version that can be installed under Python 3.13 due to https://github.com/common-workflow-language/schema_salad/blob/8.7.20240820070935/setup.py#L119

Maybe bump the python_requires to <3.14 unless you know it's actually broken?

[mr-c]

Fix is in progress at #822 :-)

[nsoranzo]

Thanks @mr-c !