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.

首先檢查儲存庫的打包與發布設定，找出建置和發布 binary wheels 的位置。確認如何將 sdist 加入該流程，然後驗證某個 release 會將 source tarball 與現有的 wheels 一併發布，並且可以使用它在不受支援的平台上建置該套件。

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