update zopflipng derivative to v2.3.0

includes patches to v1.0.3+, the last sequential patch applied is google/zopfli@7113f4e

Author: chrissimpkins

src/install-dependencies.sh

@@ -16,7 +16,7 @@ ZOPFLIPNG_BUILD_DIR="$HOME/zopfli"
 ZOPFLIPNG_EXE="$ZOPFLIPNG_BUILD_DIR/zopflipng"
 
 PNGQUANT_VERSION_TAG="2.13.0"
-ZOPFLIPNG_VERSION_TAG="v2.2.0"
+ZOPFLIPNG_VERSION_TAG="v2.3.0"
 LIBPNG_VERSION="1.6.37"
 LIBPNG_VERSION_DOWNLOAD="libpng16/$LIBPNG_VERSION/libpng-$LIBPNG_VERSION.tar.xz"
 LITTLECMS_VERSION="2.9"