Log Message:
py-Pillow: updated to 5.4.0

5.4.0:
- Docs: Improved ImageChops documentation
- Allow RGB and RGBA values for P image putpixel
- Add APNG extension to PNG plugin
- Lookup ld.so.cache instead of hardcoding search paths
- Added custom string TIFF tags
- Improve setup.py configuration
- Read textual chunks located after IDAT chunks for PNG
- Performance: Don't try to hash value if enum is empty
- Added custom int and float TIFF tags
- Fixes for issues reported by static code analysis
- GIF: Wait until mode is normalized to copy im.info into encoderinfo
- Docs: Add page of deprecations and removals
- Travis CI: Upgrade PyPy from 5.8.0 to 6.0
- Travis CI: Allow lint job to fail
- Resolve __fp when closing and deleting
- Close exclusive fp before discarding
- Updated open files documentation
- Added libjpeg_turbo to check_feature
- Change color table index background to tuple when saving as WebP
- Allow arbitrary number of comment extension subblocks
- Ensure previous FLI frame is loaded before seeking to the next
- ImageShow improvements
- Depends: Update libimagequant to 2.12.2, libtiff to 4.0.10, libwebp to 1.0.1, \ 
Tk Tcl to 8.6.9
- Check quality_layers type
- Add context manager, __del__ and close methods to TarIO
- Test: Do not play sound when running screencapture command
- Close exclusive fp on open exception
- Only close existing fp in WebP if fp is exclusive
- Docs: Re-add the downloads badge
- Added negative index to PixelAccess
- Change tuple background to global color table index when saving as GIF
- Test: Improved ImageGrab tests
- Flake8 fixes
- Only ask for YCbCr->RGB libtiff conversion for jpeg-compressed tiffs
- Optimise ImageOps.fit by combining resize and crop