Starry dependencies issues

[rodluger]

Two things we need to fix:

• theano doesn't work with newer versions of numpy. We need to pin it to something like numpy==1.20.3 in the setup file. If I ever have time I should swap out the backend for jax...
• starry now depends on tqdm; make it an explicit dependency.

[dfm]

This is the numpy pin that I use: numpy<1.22

[astronasko]

@rodluger Is there any working solution for Python 3.10? I keep trying to setup starry, including rolling back to numpy==1.20.3, but it seems like NumPy 1.20.3 does not support Python 3.10.