Features: allow to specify jpg-subsampling for Pillow #519 Thanks @seichner pluggable metrics backend #521 Thanks @phoet Modular url signer #524 Thanks @masom Bug Fix: Pallete mode fixed on WebP #520 Handle invalid images and return a 400 or 500 depending on the cause #541 Thanks @masom Cache poisoning on timeout fixed #529 Diff to previous release pypi release