support for JSR

[trusktr]

Might be nice to add JSR to the CDN options.

I can't make a PR for this because it would require access to the backend code, which is not public right now right?

[guybedford]

JSR support is on the roadmap, I hope to be able to work on it in due course.

New core contributors to the project are always very welcome, and CDN contributions could be possible as well, but yes that would requiring becoming a core member of the project first to get access to the code.