Log Message:
py-matplotlib: updated to 3.2.1

What's new in Matplotlib 3.2

Unit converters recognize subclasses
imsave accepts metadata and PIL options
cbook.normalize_kwargs
FontProperties accepts os.PathLike
Gouraud-shading alpha channel in PDF backend
Kerning adjustments now use correct values
bar3d lightsource shading
Shifting errorbars
Improvements in Logit scale ticker and formatter
rcParams for axes title location and color
3-digit and 4-digit hex colors