Update matplotlib to 3.3.4

[pyup-bot]

This PR updates matplotlib from 3.1.2 to 3.3.4.

Changelog

3.3.4

This is the fourth bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

* Fix WebAgg initialization.
* Fix parsing `QT_API` setting with mixed case.
* Fix build with link-time optimization disabled in environment.
* Fix test compatibility with NumPy 1.20.
* Fix test compatibility with pytest 6.2.

3.3.3

This is the third bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

* Fix calls to `Axis.grid` with argument `visible=True`.
* Fix fully masked `imshow`.
* Fix inconsistent color mapping in scatter for 3D plots.
* Fix notebook/nbAgg figures when used with ipywidgets in the same cell.
* Fix notebook/nbAgg/WebAgg on older (e.g., Firefox ESR) browsers.
* Fix pcolormesh with `datetime` coordinates.
* Fix performance regression with `datetime`s.
* Fix singular ticks with small log ranges.
* Fix timers/animations on wx and notebook backends.
* Remove certifi as a hard runtime dependency.

3.3.2

This is the second bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

* fix `Axis` scale on twinned `Axes`
* fix auto-close of `Figure`s in nbagg
* fix automatic title placement if `Axes` is off the `Figure`
* fix autoranging of log scales with barstacked histogram
* fix extra redraws when using `Button` or `TextBox` widgets
* fix imshow with `LogNorm` and large vmin/vmax ranges
* fix plotting Pandas `DataFrame` with string `MultiIndex`
* fix `scatter` with `marker=''`
* fix `scatter3d` color/linewidth re-projection
* fix state of mode buttons in TkAgg backends
* include license files in built distribution
* reduce Visual C++ runtime requirements on Windows

3.3.1

This is the first bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

* fix docstring import issues when running Python with optimization
* fix `hist` with categorical data, such as with Pandas
* fix install on BSD systems
* fix nbagg compatibility with Chrome 84+
* fix ordering of scatter marker size in 3D plots
* fix performance regression when plotting `Path`s
* fix reading from URL in `imread`
* fix several regressions with new date epoch handling
* fix some bad constrained and tight layout interactions with colorbars
* fix use of customized toolbars in TkAgg and WXAgg backends

3.3.0

Highlights of this release include:

- Provisional API for composing semantic axes layouts from text or nested lists
- New Axes.sharex, Axes.sharey methods
- Turbo colormap
- colors.BoundaryNorm supports extend keyword argument
- Text color for legend labels
- Pcolor and Pcolormesh now accept shading='nearest' and 'auto'
- Allow tick formatters to be set with str or function inputs
- New Axes.axline method
- Dates use a modern epoch
- Improved font weight detection
- Axes3D no longer distorts the 3D plot to match the 2D aspect ratio
- More consistent toolbar behavior across backends
- Toolbar icons are now styled for dark themes
- Cursor text now uses a number of significant digits matching pointing precision
- Functions to compute a Path's size
- savefig() gained a backend keyword argument
- Saving SVG now supports adding metadata
- Saving PDF metadata via PGF now consistent with PDF backend
- NbAgg and WebAgg no longer use jQuery & jQuery UI

For the full details please see the [What's New](https://matplotlib.org/3.3.0/users/whats_new.html) and [API changes](https://matplotlib.org/3.3.0/api/api_changes.html) in the documentation.

3.2.2

This is the second bugfix release of the 3.2.x series.

This release contains several critical bug-fixes:

- support fractional HiDPI scaling with Qt backends
- support new Python and fix syntax errors in legacy Python
- support new Qt 5 and fix support for Qt 4
- fix animation writer fallback
- fix figure resizing
- fix handling of large arcs
- fix issues with tight layout
- fix saving figures after closing windows or under certain size conditions
- fix scatter when specifying a single color
- fix several memory leaks
- fix unexpected autoscaling behavior
- fix various issues with usetex
- various minor bug and documentation fixes

3.2.1

This is the first bugfix release of the 3.2.x series.

This release contains several critical bug-fixes:

- fix `Quiver.set_UVC` calls with scalar inputs
- fix `bezier.get_parallels` failure from floating point rounding errors
- fix markers specified as tuples (polygons, stars, or asterisks)
- fix saving PNGs to file objects in some places
- fix saving figures using the nbAgg/notebook backend
- fix saving with tight layout using the PGF backend
- fix setting custom datapath in rcParams (note: it is still deprecated)
- fix various issues running setup.py in non-CI environments
- fix xpdf distiller
- various minor bug and documentation fixes

3.2.0rc1

This is the first release candidate from Matplotlib 3.2

Links

• PyPI: https://pypi.org/project/matplotlib
• Changelog: https://pyup.io/changelogs/matplotlib/
• Homepage: https://matplotlib.org