matplotlib/matplotlib: REL: v3.7.0

Highlights of this release include: Plotting and Annotation improvements hatch parameter for pie Polar plot errors drawn in polar coordinates Additional format string options in ~matplotlib.axes.Axes.bar_label ellipse boxstyle option for annotations The extent of imshow can now be expressed with units Reversed order of legend entries pcolormesh accepts RGB(A) colors View current appearance settings for ticks, tick labels, and gridlines Style files can be imported from third-party packages Improvements to 3D Plotting 3D plot pan and zoom buttons adjustable keyword argument for setting equal aspect ratios in 3D Poly3DCollection supports shading rcParam for 3D pane color Figure and Axes Layout colorbar now has a location keyword argument Figure legends can be placed outside figures using constrained_layout Per-subplot keyword arguments in subplot_mosaic subplot_mosaic no longer provisional Widget Improvements Custom styling of button widgets Blitting in Button widgets Other Improvements Source links can be shown or hidden for each Sphinx plot directive Figure hooks New & Improved Narrative Documentation Brand new :doc:Animations tutorial. New grouped and stacked bar chart <../../gallery/index.html#lines_bars_and_markers>_ examples. New section for new contributors and reorganized git instructions in the :ref:contributing guide. Restructured :doc:/tutorials/text/annotations tutorial.