Revolt.js v6

As Revolt is being updated, it's libraries update as well. Recently, revolt.js, the official JS library, was updated to a newer version (beta), introducing a few changes.
This is the last version of Remix, that works on the old revolt.js (v6) and we will continue with revolt.js v7 from now on.

Edit: revolt.js v7 is now deprecated and development has moved on to stoat.js following the rebranding from Revolt to Stoat.