* rename: branch develop -> main; master -> old-master
* Update all references to `master` and `develop`
* Update the GitHub pages docs
Co-authored-by: Jackson Mills <jmills@ripple.com>, Elliot Lee <intelliot@ripple.com>
We renamed the Google Group to xrpl-announce. In the future, the same list may be used for releases of other client libraries as well. It's a small list (less than 60 subscribers) and not very noisy, so it should be okay to include release announcements about libraries in other languages, especially since many developers are polyglots. Of course, we hope the list will grow in the future.