Unfortunately not yet. The history behind our use of Redactor is a little weird. A helpful contributor purchased an open source license of Redactor for use in NodeBB (and paid quite a bit for it, too!). So he technically owns the license and allows us to use it.
Redactor didn't like that much, so they no longer offer the open source license for purchase (even though now we are more than capable of purchasing it now), meaning we (as a company) can not purchase Redactor for use in nodebb-plugin-composer-redactor. The contributor is able to retrieve new versions, however, and give it to us.
I've sent a message to this contributor and am waiting for a response 😃