* Switch from decompress-zip to extract-zip
The former seems to hang when unzipping a ZIP64 file that uses
the general purpose bit flag 3 as file entry.
See: https://github.com/thejoshwolfe/yauzl#no-streaming-unzip-api
* Prefer to call via static member instead
Makes it clearer that a static method is being called.
* `flatten-orange.jpg`: save without chroma subsampling
To ensure no down-scaling of the Cr/Cb channels.
