Update pyproject.toml

[alfurka]

it works just fine with python=3.13

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[MatteoGiomi]

Hey @alfurka, thanks for the contribution! I think it's a good idea to extend support for 3.13.. can you also update the python versions tested by the CI (here)?

[MatteoGiomi]

@alfurka, while resolving some conflicts I pushed some changes to your branch, I hope it ok. Please don't hesitate to revert the changes otherwise. Let me know if I can proceed with this PR.