Missing the following dependencies:

python_requires = >=3.6

I believe I have fixed this.

install_requires = setuptools
setup_requires = setuptools; setuptools_scm

I don't know how to resolve these. I have a depends_on('py-setuptools') statement in the package.py file, but could not locate a setuptools-scm package.

Also, is there a reason to switch from PyPI to GitHub?

I originally had issues downloading from PyPI that I resolved. Switched it back to PyPI.

I don't know how to resolve these. I have a depends_on('py-setuptools') statement in the package.py file, but could not locate a setuptools-scm package.

There is a py-setuptools-scm package, you just need to add a build dependency on that.