Release Pillow 8.4.0 on October 15, 2021

[hugovk]

Release Checklist

See https://pillow.readthedocs.io/en/stable/releasenotes/versioning.html for
information about how the version numbers line up with releases.

Main Release

Released quarterly on January 2nd, April 1st, July 1st and October 15th.

• Open a release ticket.
• Develop and prepare release in master branch.
• Check GitHub Actions and AppVeyor to confirm passing tests in master branch.
• Check that all of the wheel builds Pillow Wheel Builder pass the tests in Travis CI and GitHub Actions.
• In compliance with PEP 440, update version identifier in src/PIL/_version.py
• Update CHANGES.rst.
• Run pre-release check via make release-test in a freshly cloned repo.
• Create branch and tag for release e.g.:

  git branch 8.4.x
  git tag 8.4.0
  git push --all
  git push --tags

• Create and check source distribution:

  make sdist
  twine check dist/*

• Create binary distributions
• Check and upload all binaries and source distributions e.g.:

  twine check dist/*
  twine upload dist/Pillow-8.4.0*

• Publish the release on GitHub
• In compliance with PEP 440, increment and append .dev0 to version identifier in src/PIL/_version.py

Binary Distributions

Windows

• Contact @cgohlke for Windows binaries via release ticket.
• Download and extract tarball from @cgohlke and copy into dist/

Mac and Linux

• Use the Pillow Wheel Builder:

  git clone https://github.com/python-pillow/pillow-wheels
  cd pillow-wheels
  ./update-pillow-tag.sh 8.4.0

• Download wheels from the Pillow Wheel Builder release
  and copy into dist/

Publicize Release

• Announce release availability via Twitter e.g. https://twitter.com/PythonPillow/status/1013789184354603010

Documentation

• Make sure the default version for Read the Docs is up-to-date with the release changes

Docker Images

• Update Pillow in the Docker Images repository

  git clone https://github.com/python-pillow/docker-images
  cd docker-images
  ./update-pillow-tag.sh 8.4.0

[doublex]

Is there a chance to fix anim-gifs in 8.4? #5656
Thanks for all your efforts!

[hugovk]

Is there a chance to fix anim-gifs in 8.4? #5656 Thanks for all your efforts!

Yes, #5756 has been merged and will be in 8.4.0.

[hugovk]

Will begin the release. First a review of the milestone (https://github.com/python-pillow/Pillow/milestone/45):

• "Align development requirements with Tidelift's Security-advised PyPI catalog"
  Align development requirements with Tidelift's Security-advised PyPI catalog #5762
  Moving to 9.0.0 milestone, not urgent for tagged 8.4.0 release.

• "Add support for Python 3.10"
  Add support for Python 3.10 #5569
  As noted (Add support for Python 3.10 #5569 (comment)), we have everything important in place, so moving to 9.0.0 milestone.
  AppVeyor are still in progress with their next-images-update milestone, and no response from Travis CI whatsoever (to the 3.10 ticket, or any other ticket, as far as I can see...)

Also, CIFuzz suddenly started failing yesterday: #5764. Looks like a timeout unrelated to code changes, I'm going to ignore it for this release (and may cancel those builds early to save resources/time).

[hugovk]

• Check GitHub Actions and AppVeyor to confirm passing tests in master branch.

The "MSYS2 MinGW 32-bit" job has a failing Qt test, even after a few restarts:

• https://github.com/python-pillow/Pillow/runs/3903048585?check_suite_focus=true

The previous build passed, and there's no code changes between the two (only removed the Tidelift workflow):

• https://github.com/python-pillow/Pillow/runs/3898344476?check_suite_focus=true

So will continue, something to check later.

[hugovk]

@cgohlke Please could you build Windows binaries? Thank you!

[cgohlke]

Here you go.

Got some QT (PyQt6 6.2.0) related failures:

============================================================= test session starts =============================================================
platform win32 -- Python 3.9.7, pytest-6.2.5, py-1.10.0, pluggy-1.0.0 -- X:\Python39\python.exe
cachedir: .pytest_cache
hypothesis profile 'default' -> database=DirectoryBasedExampleDatabase('D:\\Build\\Pillow\\Pillow-8.4.0\\.hypothesis\\examples')
--------------------------------------------------------------------
Pillow 8.4.0
Python 3.9.7 (tags/v3.9.7:1016ef3, Aug 30 2021, 20:19:38) [MSC v.1929 64 bit (AMD64)]
--------------------------------------------------------------------
Python modules loaded from X:\Python39\lib\site-packages\PIL
Binary modules loaded from X:\Python39\lib\site-packages\PIL
--------------------------------------------------------------------
--- PIL CORE support ok, compiled for 8.4.0
--- TKINTER support ok, loaded 8.6
--- FREETYPE2 support ok, loaded 2.11.0
--- LITTLECMS2 support ok, loaded 2.12
--- WEBP support ok, loaded 1.2.1
--- WEBP Transparency support ok
--- WEBPMUX support ok
--- WEBP Animation support ok
--- JPEG support ok, compiled for libjpeg-turbo 2.1.1
--- OPENJPEG (JPEG2000) support ok, loaded 2.4.0
--- ZLIB (PNG/ZIP) support ok, loaded 1.2.11
--- LIBTIFF support ok, loaded 4.3.0
--- RAQM (Bidirectional Text) support ok, loaded 0.7.2, fribidi 1.0.10, harfbuzz 2.9.1
*** LIBIMAGEQUANT (Quantization method) support not installed
*** XCB (X protocol) support not installed
--------------------------------------------------------------------

rootdir: D:\Build\Pillow\Pillow-8.4.0, configfile: setup.cfg, testpaths: Tests
plugins: anyio-3.3.2, hypothesis-6.21.5, napari-0.4.11, napari-plugin-engine-0.2.0, cov-3.0.0, forked-1.3.0, xdist-2.4.0
collected 1915 items / 1 skipped / 1914 selected

<snip>

================================================================== FAILURES ===================================================================
________________________________________________________________ test_sanity_1 ________________________________________________________________

test_images = [<PIL.PpmImagePlugin.PpmImageFile image mode=RGB size=128x128 at 0x20ADDE98FA0>, <PIL.PngImagePlugin.PngImageFile image mode=RGBA size=200x150 at 0x20ADDE98B80>, <PIL.PngImagePlugin.PngImageFile image mode=RGB size=7x13 at 0x20ADDE98400>]

    def test_sanity_1(test_images):
        for im in test_images:
>           roundtrip(im.convert("1"))

Tests\test_image_fromqimage.py:40:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tests\test_image_fromqimage.py:30: in roundtrip
    result = ImageQt.fromqimage(intermediate)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PIL.ImageQt.ImageQt object at 0x0000020ADDE99350>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
_______________________________________________________________ test_sanity_rgb _______________________________________________________________

test_images = [<PIL.PpmImagePlugin.PpmImageFile image mode=RGB size=128x128 at 0x20AEDDD8E50>, <PIL.PngImagePlugin.PngImageFile image mode=RGBA size=200x150 at 0x20AEDDD8AC0>, <PIL.PngImagePlugin.PngImageFile image mode=RGB size=7x13 at 0x20AEDDD8F10>]

    def test_sanity_rgb(test_images):
        for im in test_images:
>           roundtrip(im.convert("RGB"))

Tests\test_image_fromqimage.py:45:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tests\test_image_fromqimage.py:30: in roundtrip
    result = ImageQt.fromqimage(intermediate)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PIL.ImageQt.ImageQt object at 0x0000020ADDEA67B0>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
______________________________________________________________ test_sanity_rgba _______________________________________________________________

test_images = [<PIL.PpmImagePlugin.PpmImageFile image mode=RGB size=128x128 at 0x20AEDE8E1F0>, <PIL.PngImagePlugin.PngImageFile image mode=RGBA size=200x150 at 0x20AEDC02490>, <PIL.PngImagePlugin.PngImageFile image mode=RGB size=7x13 at 0x20ADDE33340>]

    def test_sanity_rgba(test_images):
        for im in test_images:
>           roundtrip(im.convert("RGBA"))

Tests\test_image_fromqimage.py:50:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tests\test_image_fromqimage.py:30: in roundtrip
    result = ImageQt.fromqimage(intermediate)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PIL.ImageQt.ImageQt object at 0x0000020ADDEA6E40>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
________________________________________________________________ test_sanity_l ________________________________________________________________

test_images = [<PIL.PpmImagePlugin.PpmImageFile image mode=RGB size=128x128 at 0x20AEDB7F460>, <PIL.PngImagePlugin.PngImageFile image mode=RGBA size=200x150 at 0x20AEDB7F610>, <PIL.PngImagePlugin.PngImageFile image mode=RGB size=7x13 at 0x20AEDB7F130>]

    def test_sanity_l(test_images):
        for im in test_images:
>           roundtrip(im.convert("L"))

Tests\test_image_fromqimage.py:55:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tests\test_image_fromqimage.py:30: in roundtrip
    result = ImageQt.fromqimage(intermediate)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PIL.ImageQt.ImageQt object at 0x0000020ADDE99E40>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
________________________________________________________________ test_sanity_p ________________________________________________________________

test_images = [<PIL.PpmImagePlugin.PpmImageFile image mode=RGB size=128x128 at 0x20AEDAD7FA0>, <PIL.PngImagePlugin.PngImageFile image mode=RGBA size=200x150 at 0x20AEDAD7610>, <PIL.PngImagePlugin.PngImageFile image mode=RGB size=7x13 at 0x20AEDAD7F70>]

    def test_sanity_p(test_images):
        for im in test_images:
>           roundtrip(im.convert("P"))

Tests\test_image_fromqimage.py:60:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tests\test_image_fromqimage.py:30: in roundtrip
    result = ImageQt.fromqimage(intermediate)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PIL.ImageQt.ImageQt object at 0x0000020ADDEAD430>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
_________________________________________________________________ test_sanity _________________________________________________________________

tmp_path = WindowsPath('C:/Users/gohlke/AppData/Local/Temp/pytest-of-gohlke/pytest-8/test_sanity8')

    @pytest.mark.skipif(not ImageQt.qt_is_installed, reason="Qt bindings are not installed")
    def test_sanity(tmp_path):
        # Segfault test
        app = QApplication([])
        ex = Example()
        assert app  # Silence warning
        assert ex  # Silence warning

        for mode in ("1", "RGB", "RGBA", "L", "P"):
            # to QPixmap
            im = hopper(mode)
            data = ImageQt.toqpixmap(im)

            assert isinstance(data, QPixmap)
            assert not data.isNull()

            # Test saving the file
            tempfile = str(tmp_path / f"temp_{mode}.png")
            data.save(tempfile)

            # Render the image
            qimage = ImageQt.ImageQt(im)
            data = QPixmap.fromImage(qimage)
            qt_format = QImage.Format if ImageQt.qt_version == "6" else QImage
            qimage = QImage(128, 128, qt_format.Format_ARGB32)
            painter = QPainter(qimage)
            image_label = QLabel()
            image_label.setPixmap(data)
            image_label.render(painter, QPoint(0, 0), QRegion(0, 0, 128, 128))
            painter.end()
            rendered_tempfile = str(tmp_path / f"temp_rendered_{mode}.png")
            qimage.save(rendered_tempfile)
            assert_image_equal_tofile(im.convert("RGBA"), rendered_tempfile)

            # from QPixmap
>           roundtrip(hopper(mode))

Tests\test_qt_image_qapplication.py:85:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tests\test_qt_image_qapplication.py:45: in roundtrip
    result = ImageQt.fromqpixmap(ImageQt.toqpixmap(expected))
X:\Python39\lib\site-packages\PIL\ImageQt.py:87: in fromqpixmap
    return fromqimage(im)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PyQt6.QtGui.QPixmap object at 0x0000020ADF342CF0>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
_________________________________________________________________ test_sanity _________________________________________________________________

tmp_path = WindowsPath('C:/Users/gohlke/AppData/Local/Temp/pytest-of-gohlke/pytest-8/test_sanity9')

    def test_sanity(tmp_path):
        for mode in ("RGB", "RGBA", "L", "P", "1"):
            src = hopper(mode)
            data = ImageQt.toqimage(src)

            assert isinstance(data, QImage)
            assert not data.isNull()

            # reload directly from the qimage
>           rt = ImageQt.fromqimage(data)

Tests\test_qt_image_toqimage.py:24:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

im = <PIL.ImageQt.ImageQt object at 0x0000020ADE0A85F0>

    def fromqimage(im):
        """
        :param im: QImage or PIL ImageQt object
        """
        buffer = QBuffer()
>       qt_openmode = QIODevice.OpenMode if qt_version == "6" else QIODevice
E       AttributeError: type object 'QIODevice' has no attribute 'OpenMode'

X:\Python39\lib\site-packages\PIL\ImageQt.py:69: AttributeError
============================================================== warnings summary ===============================================================
Tests\test_file_eps.py:283
  D:\Build\Pillow\Pillow-8.4.0\Tests\test_file_eps.py:283: PytestUnknownMarkWarning: Unknown pytest.mark.timeout - is this a typo?  You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/stable/mark.html
    @pytest.mark.timeout(timeout=5)

Tests\test_file_fli.py:135
  D:\Build\Pillow\Pillow-8.4.0\Tests\test_file_fli.py:135: PytestUnknownMarkWarning: Unknown pytest.mark.timeout - is this a typo?  You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/stable/mark.html
    @pytest.mark.timeout(timeout=3)

Tests\test_file_pdf.py:315
  D:\Build\Pillow\Pillow-8.4.0\Tests\test_file_pdf.py:315: PytestUnknownMarkWarning: Unknown pytest.mark.timeout - is this a typo?  You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/stable/mark.html
    @pytest.mark.timeout(1)

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================================================== short test summary info ===========================================================
SKIPPED [1] Tests\oss-fuzz\test_fuzzers.py:11: Fuzzer is linux only
SKIPPED [1] Tests\test_features.py:68: libimagequant not available
SKIPPED [1] Tests\test_file_gif.py:223: Netpbm not available
SKIPPED [1] Tests\test_file_gif.py:234: Netpbm not available
SKIPPED [4] Tests\test_file_jpeg2k.py:281: Extra image files not installed
SKIPPED [1] Tests\test_file_msp.py:58: Extra image files not installed
SKIPPED [1] Tests\test_file_msp.py:72: Even More Extra image files not installed
SKIPPED [1] Tests\test_file_png.py:770: Requires Unix or macOS
SKIPPED [1] Tests\test_file_sun.py:35: Extra image files not installed
SKIPPED [1] Tests\test_file_tiff.py:716: Extra image files not installed
SKIPPED [1] Tests\test_font_leaks.py:20: Requires Unix or macOS
SKIPPED [1] Tests\test_font_leaks.py:31: Requires Unix or macOS
SKIPPED [1] Tests\test_image.py:196: Test requires opening tempfile twice
SKIPPED [1] Tests\test_image_quantize.py:27: libimagequant support not available
SKIPPED [1] Tests\test_imagedraw.py:974: failing
SKIPPED [2] Tests\test_imagefont.py:495: requires Unix or macOS
SKIPPED [2] Tests\test_imagefont.py:536: requires Unix or macOS
SKIPPED [2] Tests\test_imagefontctl.py:238: fails with this font
SKIPPED [1] Tests\test_imagegrab.py:27: xcb not available
SKIPPED [1] Tests\test_imagegrab.py:50: xcb not available
SKIPPED [1] Tests\test_imageshow.py:44: Only run on CIs; hangs on Windows CIs
SKIPPED [1] Tests\test_shell_injection.py:25: Requires Unix or macOS
SKIPPED [1] Tests\test_shell_injection.py:34: Requires Unix or macOS
SKIPPED [1] Tests\test_shell_injection.py:39: Netpbm not available
SKIPPED [1] Tests\test_shell_injection.py:45: Netpbm not available
SKIPPED [3] Tests\test_tiff_crashes.py:50: test image not found
SKIPPED [1] Tests\test_webp_leaks.py:16: Requires Unix or macOS
XFAIL Tests/test_decompression_bomb.py::TestDecompressionBomb::test_exception_ico
  different exception
XFAIL Tests/test_image_resample.py::TestCoreResampleAlphaCorrect::test_levels_rgba
  Current implementation isn't precise enough
XFAIL Tests/test_image_resample.py::TestCoreResampleAlphaCorrect::test_levels_la
  Current implementation isn't precise enough
XPASS Tests/test_file_palm.py::test_p_mode Palm P image is wrong
FAILED Tests/test_image_fromqimage.py::test_sanity_1 - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
FAILED Tests/test_image_fromqimage.py::test_sanity_rgb - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
FAILED Tests/test_image_fromqimage.py::test_sanity_rgba - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
FAILED Tests/test_image_fromqimage.py::test_sanity_l - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
FAILED Tests/test_image_fromqimage.py::test_sanity_p - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
FAILED Tests/test_qt_image_qapplication.py::test_sanity - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
FAILED Tests/test_qt_image_toqimage.py::test_sanity - AttributeError: type object 'QIODevice' has no attribute 'OpenMode'
================================ 7 failed, 1870 passed, 35 skipped, 3 xfailed, 1 xpassed, 3 warnings in 45.09s ================================

[hugovk]

Thank you! Looks similar to the Qt failures with MSYS2 MinGW 32-bit.

[hugovk]

Forgot to remove this placeholder from the release notes:

https://pillow.readthedocs.io/en/stable/releasenotes/8.4.0.html

For clarity, Pillow 8.4.0 does not contain security updates.

[hugovk]

🚀🐍 Pillow 8.4.0 is released!

• https://pypi.org/project/Pillow/8.4.0/
• https://twitter.com/PythonPillow/status/1448937681157754887

Thanks everyone!