Bump pillow from 6.2.1 to 8.2.0 in /backend

[dependabot[bot]]

Bumps pillow from 6.2.1 to 8.2.0.

Release notes

Sourced from pillow's releases.

8.2.0

https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html

Changes

• Security fixes for 8.2.0 #5377 [@​hugovk]
• Move getxmp() to JpegImageFile #5376 [@​radarhere]
• Added getxmp() method #5144 [@​UrielMaD]
• Compile LibTIFF with CMake on Windows #5359 [@​nulano]
• Add ImageShow support for GraphicsMagick #5349 [@​latosha-maltba]
• Tiff crash fixes in TiffDecode.c #5372 [@​wiredfool]
• Remove redundant check (addition to #5364) #5366 [@​kkopachev]
• Do not load transparent pixels from subsequent GIF frames #5333 [@​radarhere]
• Use LZW encoding when saving GIF images #5291 [@​raygard]
• Set all transparent colors to be equal in quantize() #5282 [@​radarhere]
• Allow PixelAccess to use Python int when parsing x and y #5206 [@​radarhere]
• Removed Image._MODEINFO #5316 [@​radarhere]
• Add preserve_tone option to autocontrast #5350 [@​elejke]
• Only import numpy when necessary #5323 [@​radarhere]
• Fixed linear_gradient and radial_gradient I and F modes #5274 [@​radarhere]
• Add support for reading TIFFs with PlanarConfiguration=2 #5364 [@​wiredfool]
• More OSS-Fuzz support #5328 [@​wiredfool]
• Do not premultiply alpha when resizing with Image.NEAREST resampling #5304 [@​nulano]
• Use quantization method attributes #5353 [@​radarhere]
• Dynamically link FriBiDi instead of Raqm #5062 [@​nulano]
• Removed build_distance_tables return value #5363 [@​radarhere]
• Allow fewer PNG palette entries than the bit depth maximum when saving #5330 [@​radarhere]
• Use duration from info dictionary when saving WebP #5338 [@​radarhere]
• Improved efficiency when creating GIF disposal images #5326 [@​radarhere]
• Stop flattening EXIF IFD into getexif() #4947 [@​radarhere]
• Replaced tiff_deflate with tiff_adobe_deflate compression when saving TIFF images #5343 [@​radarhere]
• Save ICC profile from TIFF encoderinfo #5321 [@​radarhere]
• Moved RGB fix inside ImageQt class #5268 [@​radarhere]
• Fix -Wformat error in TiffDecode #5305 [@​lukegb]
• Allow alpha_composite destination to be negative #5313 [@​radarhere]
• Ensure file is closed if it is opened by ImageQt.ImageQt #5260 [@​radarhere]
• Added ImageDraw rounded_rectangle method #5208 [@​radarhere]
• Added IPythonViewer #5289 [@​radarhere]
• Only draw each rectangle outline pixel once #5183 [@​radarhere]
• Use mmap instead of built-in Win32 mapper #5224 [@​radarhere]
• Handle PCX images with an odd stride #5214 [@​radarhere]
• Only read different sizes for "Large Thumbnail" MPO frames #5168 [@​radarhere]

Dependencies

• Updated harfbuzz to 2.8.0 #5334 [@​radarhere]

Deprecations

... (truncated)

Changelog

Sourced from pillow's changelog.

8.2.0 (2021-04-01)

• Added getxmp() method #5144 [UrielMaD, radarhere]

• Add ImageShow support for GraphicsMagick #5349 [latosha-maltba, radarhere]

• Do not load transparent pixels from subsequent GIF frames #5333 [zewt, radarhere]

• Use LZW encoding when saving GIF images #5291 [raygard]

• Set all transparent colors to be equal in quantize() #5282 [radarhere]

• Allow PixelAccess to use Python int when parsing x and y #5206 [radarhere]

• Removed Image._MODEINFO #5316 [radarhere]

• Add preserve_tone option to autocontrast #5350 [elejke, radarhere]

• Fixed linear_gradient and radial_gradient I and F modes #5274 [radarhere]

• Add support for reading TIFFs with PlanarConfiguration=2 #5364 [kkopachev, wiredfool, nulano]

• Deprecated categories #5351 [radarhere]

• Do not premultiply alpha when resizing with Image.NEAREST resampling #5304 [nulano]

• Dynamically link FriBiDi instead of Raqm #5062 [nulano]

• Allow fewer PNG palette entries than the bit depth maximum when saving #5330 [radarhere]

• Use duration from info dictionary when saving WebP #5338 [radarhere]

• Stop flattening EXIF IFD into getexif() #4947 [radarhere, kkopachev]

... (truncated)

Commits

• e0e353c 8.2.0 version bump
• ee635be Merge pull request #5377 from hugovk/security-and-release-notes
• 694c84f Fix typo [ci skip]
• 8febdad Review, typos and lint
• fea4196 Reorder, roughly alphabetic
• 496245a Fix BLP DOS -- CVE-2021-28678
• 22e9bee Fix DOS in PSDImagePlugin -- CVE-2021-28675
• ba65f0b Fix Memory DOS in ImageFont
• bb6c11f Fix FLI DOS -- CVE-2021-28676
• 5a5e6db Fix EPS DOS on _open -- CVE-2021-28677
• Additional commits viewable in compare view

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Superseded by #45.