v0.23.3 - 17th November 2019

Ensure trim operation supports images contained in the alpha channel. #1597

Ensure tile overlap option works as expected. #1921 @rustyguts

Allow compilation on FreeBSD and variants (broken since v0.23.0) #1952 @pouya-eghbali

Ensure modulate and other colour-based operations can co-exist. #1958