NumPy v2 support

[KowerKoint]

It seems that OpenFermion depends on numpy>=1.24,<2.0, but since numpy<2.0 does not support Python 3.13, I would like to use numpy>=2.0. Do you have any plans to support NumPy v2?

[marcosdiezgarcia]

PR #923 restricts numpy<2.0. This PR is from ~2 months ago, so not long ago. I am wondering if there is a good reason to restrict it, and if you plan to upgrade. Thanks.