pip check fails in mintpy-feedstock due to PySolid's `setuptools_scm` dependency

[yunjunz]

pip check is failing because PySolid's pyproject.toml has setuptools_scm as a requirement via this line:

https://github.com/insarlab/PySolid/blob/main/pyproject.toml#L39

So, it thinks it's a runtime dependency that is missing. We should fix that in PySolid.

Originally posted by @jhkennedy in conda-forge/mintpy-feedstock#11 (comment)

[yunjunz]

@jhkennedy Could you take a look at this when you get a chance?