The curriculum update will include ES6
To expand on what @kevcomedia said, in case you’re not familiar with the update cycle here, ES6 syntax is currently in beta.
The new curriculum is now in beta testing. If you’re interested in being a beta tester (or just seeing what is coming) check out this forum thread. Here is a brief explanation of the decision to wait for a single large release.
It would be nice to see es8 added as well. Async/await is one of the best things I have seen in JS.
Though, I don’t mind using official docs at all.