Update Webmention.js to support RSVPs
As part of #570 (closed), we want to use the latest upstream version of webmention.js0 which supports better RSVP rendering.
Closes #570 (closed).
As part of #570 (closed), we want to use the latest upstream version of webmention.js0 which supports better RSVP rendering.
Closes #570 (closed).