Bump matplotlib from 3.3.4 to 3.4.0

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Bumps matplotlib from 3.3.4 to 3.4.0.

Release notes

Sourced from matplotlib's releases.

REL: v3.4.0

Highlights of this release include:

• Figure and Axes creation / management
  • New subfigure functionality
  • Single-line string notation for subplot_mosaic
  • Changes to behavior of Axes creation methods (gca, add_axes, add_subplot)
  • add_subplot/add_axes gained an axes_class parameter
  • Subplot and subplot2grid can now work with constrained layout
• Plotting methods
  • axline supports transform parameter
  • New automatic labeling for bar charts
  • A list of hatches can be specified to bar and barh
  • Setting BarContainer orientation
  • Contour plots now default to using ScalarFormatter
  • Axes.errorbar cycles non-color properties correctly
  • errorbar errorevery parameter matches markevery
  • hexbin supports data reference for C parameter
  • Support callable for formatting of Sankey labels
  • Axes.spines access shortcuts
  • New stairs method and StepPatch artist
  • Added orientation parameter for stem plots
  • Angles on Bracket arrow styles
  • TickedStroke patheffect
• Colors and colormaps
  • Collection color specification and mapping
  • Transparency (alpha) can be set as an array in collections
  • pcolormesh has improved transparency handling by enabling snapping
  • IPython representations for Colormap objects
  • Colormap.set_extremes and Colormap.with_extremes
  • Get under/over/bad colors of Colormap objects
  • New cm.unregister_cmap function
  • New CenteredNorm for symmetrical data around a center
  • New FuncNorm for arbitrary normalizations
  • GridSpec-based colorbars can now be positioned above or to the left of the main axes
• Titles, ticks, and labels
  • supxlabel and supylabel
  • Shared-axes subplots tick label visibility is now correct for top or left labels
  • An iterable object with labels can be passed to Axes.plot
• Fonts and Text
  • Text transform can rotate text direction
  • matplotlib.mathtext now supports overset and underset LaTeX symbols
  • math_fontfamily parameter to change Text font family
  • TextArea/AnchoredText support horizontalalignment
  • PDF supports URLs on Text artists
• rcParams improvements
  • New rcParams for dates: set converter and whether to use interval_multiples
  • Date formatters now respect usetex rcParam
  • Setting image.cmap to a Colormap
  • Tick and tick label colors can be set independently using rcParams

... (truncated)

Commits

• 53ba85e REL: v3.4.0
• 7aaf43b DOC: Update GitHub stats for 3.4.0.
• dffe59f Merge pull request #19775 from QuLogic/fix-imread-deprecation
• 8f2f97a Fix deprecation for imread on URLs.
• bdb7774 Merge pull request #19772 from meeseeksmachine/auto-backport-of-pr-19535-on-v...
• b46c7c5 Backport PR #19535: Fix example's BasicUnit array conversion.
• d9c63f4 Merge pull request #19771 from meeseeksmachine/auto-backport-of-pr-19757-on-v...
• 705123c Merge pull request #19770 from meeseeksmachine/auto-backport-of-pr-19739-on-v...
• b0e73d0 Backport PR #19757: Fixed python -mpip typo
• 887ec5f Backport PR #19739: Changed 'python -mpip' to 'python -m pip' for consistency
• Additional commits viewable in compare view

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