renderjs 2689 -> 2891 lines, jio-latest 16043 -> 16177, rsvp gains
cancel(msg) support. Root copies (rsvp.js, renderjs.js, jiodev.js)
used by crib-enable.html kept byte-identical to lib/.
Source: lab.nexedi.com nexedi/{renderjs,jio,rsvp.js} master dist.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>