Publish sdist with releases

Would a change to also make a sdist tarball get published for releases be accepted?

Currently the abi3 binary wheels are great (much better than a bunch of CPython interpreter version specific wheels), though it doesn't give a way for people to install the wheel that are using PyPy. Alternate pip indexes for specific platforms not supported by PyPI such as piwheels.org and Pyodide also need an sdist in order to build wheels from PyPI.

Having an sdist also means I can install die-python on systems with CPUs that currently don't have binary wheels published, such as ppcle64 and risc-v systems. For releasing other software that depends on die-python this is particularly helpful, since PyPI doesn't allow uploading packages that have dependencies installed via direct git/http URLs.