Alternative textureResize() implementations

[donmccurdy]

It may be beneficial for this project to consider alternative libraries for resizing textures. The project currently uses ndarray-lanczos, solely for the reason that it works both in Node.js and Web. But it's not particularly fast or memory efficient, leading to issues like #344, and may have other bugs like #562.

I'd been hoping that @squoosh/lib would eventually work on the web (GoogleChromeLabs/squoosh#1084), and I could switch to its resize implementation. But it's unclear if that will happen.

The best Node.js resizing implementation is probably sharp.js, so supporting this as an alternative might be the way to go.

A few other related issues:

• Support use of resize() function in Web Workers #612
• Support percentage (%) in textureResize function #515