Packaging updates

[billbrod]

Copying from pyopensci review:

I would change trove classifiers

• the package is not in beta annymore if you are using in the lab
• you can also specify specific pythons: 3.7, etc

You probably want to raise the minimum python requires and adhere to SPEC0 since you are depending on core scientific python libraries

right now core packages are at 3.10-3.12, but if you need numba then you might need to raise it to 3.9 and test on 3.9-3.11 since numba/numba#9197