DEP: drop support for matplotlib<3.5 #122
Merged
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this should be okay now that yt (dev) requires matplotlib>=3.5 (yt-project/yt#4521)
Also avoid unnecessary copies (
matplotlib.colormaps.register
always copies inputs, so we don't need an extra copy to safely modify a colormap). This makes cmyt finally negligible in terms of startup overhead inimport yt
(going from 4% to <0.8%).