v0.22.0 - 18th March 2019

Remove functions previously deprecated in v0.21.0: background, crop, embed, ignoreAspectRatio, max, min and withoutEnlargement.

Add composite operation supporting multiple images and blend modes; deprecate overlayWith. #728

Add support for pages input option for multi-page input. #1566

Allow Stream-based input of raw pixel data. #1579

Add support for page input option to GIF and PDF. #1595 @ramiel