Roadmap to making Safari support official?

[danburzo]

We have a live environment where users (on relatively recent versions of Firefox, Chrome and Safari) enter rich text via Scribe. It gets used tens of thousands of times each month from Safari without any major hurdles -- we're monitoring client errors with Sentry and applying patches if necessary.

As such, I believe Scribe is pretty much ready for prime time in Safari. Is there anything, with the caveat of adding the necessary polyfills (Object.assign), that would be needed to declare official support (e.g. tests that run against Safari)?