* Py-x21 now works, needs dependencies
Conflicts:
var/spack/repos/rit-rc/packages/py-x21/package.py
* Added dependencies to py-x21
* Making flake style check happy
* [py-x21] flake8
* [py-x21]
- added homepage
- added placeholder description
- added comment about checksums
* [py-x21] added darwin support and fixed issue with python 3.7 wheel name
* [py-x21] adding checksum hash
* [py-x21] removed duplicate py-pynacl
* [py-x21]
- updated description
- updated version listing to have a different version for each version
of python. Also, versions dependent on sys.platform
- updated url_for_version to not require post concretized information so
that spack checksum works
* [py-x21] isort
Co-authored-by: vehrc <vehrc@rit.edu>