* Remove outdated pystrings.swg (#508).
* Fix segfault from repr attempting to access attrs on uninitialized
instance (#520).
* Add Python 3.12 support (#486).
* Copy edges keys when copying a graph
* Drop Python 3.8 support per SPEC 0 (#465).
* Drop Python 3.9 support (#487).
* Update documentation building requirements (#488).
* Add pyproject.toml (#471).
* Stop building pdf of the docs (#503).
- Drop patch docdir.patch, no longer needed.
- Build the documentation by hand, since now we need to.
- Switch to pyproject macros.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-pygraphviz?expand=0&rev=29
