chore(py): Support python 3.13

[aborgna-q]

Let's try #653 again.
The latest pytket supports python 3.13, so we can update here.

We now follow the general recommendation against setting a hard python version bound in the pyproject.toml's requires-python field.

[lmondada]

I found it counter intuitive at first that we shouldn't put an upper bound on the supported Python version, but the document you linked made good points 👍