Error running npm build

[skipkayhil]

> prerender-loader@1.3.0 build /.../prerender-loader
> microbundle -f cjs --no-compress --external all

Error: Plugin 'jsx' not found

I'm interested in creating a PR to not stub out requestAnimationFrame, as this prevents me using this with hyperapp, which uses requestAnimationFrame for rendering. However, I have been unable to build this with microbundle.