…t-of-pr-18500-on-v3.3.x

Backport PR matplotlib#18500 on branch v3.3.x (BUG: Fix all-masked imshow)

…s none.

…t-of-pr-18505-on-v3.3.x

Backport PR matplotlib#18505 on branch v3.3.x (Fix depth shading when edge/facecolor is none.)

… ExitStack.callback.

…t-before-interp

FIX: unit-convert pcolorargs before interpolating

…t-of-pr-18540-on-v3.3.x

Backport PR matplotlib#18540 on branch v3.3.x (Call to ExitStack.push should have been ExitStack.callback.)

…18549-on-v3.3.x

backport pr 18549

…t-of-pr-18604-on-v3.3.x

Backport PR matplotlib#18604 on branch v3.3.x (Update test image to fix Ghostscript 9.53.)

…t-of-pr-18621-on-v3.3.x

Backport PR matplotlib#18621 on branch v3.3.x (Fix singleshot timers in wx.)

…t-of-pr-18636-on-v3.3.x

Backport PR matplotlib#18636 on branch v3.3.x (BLD: certifi is not a run-time dependency)

…events.

…t-of-pr-18639-on-v3.3.x

Backport PR matplotlib#18639 on branch v3.3.x (nbagg: Don't close figures for bubbled events.)

…t-of-pr-18670-on-v3.3.x

Backport PR matplotlib#18670 on branch v3.3.x (MNT: make certifi actually optional)

…t-of-pr-18584-on-v3.3.x

Backport PR matplotlib#18584 on branch v3.3.x (Fix setting 0-timeout timer with Tornado.)

…18533-on-v3.3.x

Backport PR matplotlib#18533 on branch v3.3.x

…t-of-pr-18734-on-v3.3.x

Backport PR matplotlib#18734 on branch v3.3.x (Fix deprecation warning in GitHub Actions.)

…t-of-pr-18773-on-v3.3.x

Backport PR matplotlib#18773 on branch v3.3.x (Update to latest cibuildwheel release.)

… with small log ranges

…t-of-pr-18754-on-v3.3.x

Backport PR matplotlib#18754 on branch v3.3.x (FIX: make sure we have more than 1 tick with small log ranges)

…18769-on-v3.3.x

Backport PR matplotlib#18769 on branch v3.3.x

…t-of-pr-19131-on-v3.3.x

Backport PR matplotlib#19131 on branch v3.3.x (Fix WebAgg initialization)

…d with some capitals

…t-of-pr-19245-on-v3.3.x

Backport PR matplotlib#19245 on branch v3.3.x (handle usecase where QT_API is specified with some capitals)

…t-of-pr-19266-on-v3.3.x

Backport PR matplotlib#19266 on branch v3.3.x (Don't update homebrew on GitHub Actions)

…targets.

…t-of-pr-19163-on-v3.3.3-doc

Backport PR matplotlib#19163 on branch v3.3.3-doc (Ignore missing _FancyAxislineStyle doc targets.)

…t-of-pr-19279-on-v3.3.3-doc

Backport PR matplotlib#19279 on branch v3.3.3-doc (Fix sphinx search)

…19301-on-v3.3.x

Backport PR matplotlib#19301 on branch v3.3.x

…t-of-pr-19371-on-v3.3.x

Backport PR matplotlib#19371 on branch v3.3.x (Fix specgram test on NumPy 1.20.)

…t-of-pr-19052-on-v3.3.x

Backport PR matplotlib#19052 on branch v3.3.x (Always pass integers to wx.Size.)

…t-of-pr-19238-on-v3.3.x

Backport PR matplotlib#19238 on branch v3.3.x (Fix build with LTO disabled in environment)

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 LTO disabled in environment.
* Fix test compatibility with Python 3.10.
* Fix test compatibility with NumPy 1.20.
* Fix test compatibility with pytest 6.2.

So the tarballs from GitHub are stable.