Changes
=======
* Enable support for pattern matching (96)
(by antonagestam in 7071a24d)
* add support for aix/sunos (98)
(by mattp- in 765e4ee0)
* Python 3.12 compatibility (105)
(by elprans in f7978225)
* Add __contains__ to MapKeys (99)
(by msullivan in 6790111e)
* Add PEP 585 GenericAlias support (101)
(by eltoder in 9ce64c53)
* Move metadata to `pyproject.toml`, fix test fixture inclusion in sdist (111)
(by elprans in ea656567 for)