* security disclosure docs

* Add python 3.11 support

* ci: use `windows-2019` runners

`windows-2016` runners have been removed

* ci: use CPython 3.11.0-rc.2 for Windows builds

Co-authored-by: Matt Davis <[email protected]>

* keeps libyaml extension build functional once Cython 3.0 releases; stopgap measure until we can rewrite the extension build to eliminate all the ancient deprecated distutils magic

* misc CI updates

(cherry picked from commit 155ec46)

* Conditional support for Cython3.x, CI updates (#808)

* Cython 3.x support needed for Python 3.13
* Move CI to a dynamic matrix
* Use GHA-hosted Apple Silicon runners
* Move Windows builds to cibuildwheel
* Implement rudimentary PEP517 config-settings passthru to setuptools with
  custom in-tree setuptools build backend shim (blocked Windows build
  being moved to cibuildwheel).
* Use build_config.toml to smuggle JSON to cibuildwheel, since it
  trashes JSON via CLI when doing containerized builds.

(cherry picked from commit a2d19c0)

* changes for 6.0.2rc1

* fix manifest test inclusion

* fix `setup.py test` and issue deprecation warning (#820)

* direct invocation of `setup.py` commands has been long deprecated by setuptools

(cherry picked from commit f74f335)

* release 6.0.2