Bug 1791056 - Cleanup peer_emeritus list for JavaScript module. r=jandem,zeid

With great appreciation for their contributions, we move JavaScript peers who
are no longer active on the project to the emeritus list, including: caroline,
luke, sunfish, fitzgen, djvj, waldo. Also sort the peer lists alphabetically
since we never were very consistent about the order we added people.

Differential Revision: https://phabricator.services.mozilla.com/D157504