Snap.as support for .webp images?

Is it possible to add support for .webp file-type in snap.as ?
I recently wrote a post about optimizing my web page performance and found out that snap.as converts webp upload to png automatically:
https://pbeliveau.ca/easily-optimize-your-blog-performance

This would be great to offer for files originally in png, but AVIF would be better for Jpeg/RAW files.

Also opened a ticket on github