message: Update changes for 0.20
diff: @@ -8,6 +8,25 @@ Rust image aims to be a pure-Rust implementation of various popular image format
  ## Changes
  +### Version 0.20
  +
  +- Clippy lint pass
  +- Updated num-rational dependency
  +- Added BGRA and BGR color types
  +- Improved performance of image resizing
  +- Improved PBM decoding
  +- PNM P4 decoding now returns bits instead of bytes
  +- Fixed move of overlapping buffers in BMP decoder
  +- Fixed some document comments
  +- `GenericImage` and `GenericImageView` is now object-safe
  +- Moved TIFF code to its own library
  +- Fixed README examples
  +- Fixed ordering of interpolated parameters in TIFF decode error string
  +- Thumbnail now handles upscaling
  +- GIF encoding for multiple frames
  +- Improved subimages API
  +- Cargo fmt fixes
  +
  ### Version 0.19
  - Fixed panic when blending with alpha zero.
  