This is the first bugfix release of the 3.9.x series.
This release contains several bug-fixes and adjustments:
- Add GitHub artifact attestations for sdist and wheels
- Re-add `matplotlib.cm.get_cmap`; note this function will still be
removed at a later date
- Allow duplicate backend entry points
- Fix `Axes` autoscaling of thin bars at large locations
- Fix `Axes` autoscaling with `axhspan` / `axvspan`
- Fix `Axes3D` autoscaling of `Line3DCollection` / `Poly3DCollection`
- Fix `Axes3D` mouse interactivity with non-default roll angle
- Fix box aspect ratios in `Axes3D` with alternate vertical axis
- Fix case handling of backends specified as `module://...`
- Fix crash with TkAgg on Windows with `tk.window_focus: True`
- Fix interactive update of SubFigures
- Fix interactivity when using the IPython console
- Fix pickling of AxesWidgets and SubFigures
- Fix scaling on GTK3Cairo / GTK4Cairo backends
- Fix text wrapping within SubFigures
- Promote `mpltype` Sphinx role to a public extension; note this is only
intended for development reasons