* Build wheels for Python 3.13
* Deprecate support for Python version before 3.9 and stop
building wheels for them
* Compatibility with Python 3.13
* Upgrade zstd source code from v1.5.5 to v1.5.6
* Fix pyzstd_pep517 parameter name in
`get_requires_for_build_wheel`
* Deprecate support for Python version before 3.8 and stop
building wheels for them
* Minor fixes in type hints
* Refactor README & CHANGELOG files
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-pyzstd?expand=0&rev=11