Build python 3.12 wheels in Github Actions

[sondreso]

No description provided.

[sveinung-r]

Not sure why the manylinux wheels for Python 3.9 is all of a sudden failing, but we can try building everything from 3.9 and above with manylinux2014. Or perhaps build everything with manylinux2014?

[sondreso]

slice objects are now hashable, allowing them to be used as dict keys and set items. (Contributed by Will Bradshaw, Furkan Onder, and Raymond Hettinger in gh-101264.)'

• From https://docs.python.org/3/whatsnew/3.12.html#other-language-changes

This seems to break some assumptions in the code from what I can tell. My knowledge of the inner workings of segyio is limited, so whoever wants to give it a try please feel free to hijack this PR and give it a spin 🙂