Support ES8 (ES 2017), in addition to ES7 (ES 2016)

[jescalan]

With the latest version of standard, this code produces an error, but is perfectly valid es6:

async () => { console.log('hello') }

Maybe I'm doing something wrong here? I'd think someone else would have noticed this before...

[feross]

We support ES7 at the moment, but async actually is part of the ES8 spec.

(ESLint supports ES8, so we can try updating to that again. I only updated us to ES7 earlier this week since in ES8 mode, I ran into a parse bug that treated async as a reserved word which broke valid uses like cb({ async: true }). That was just fixed in espree, though.

I'll give this another shot.

[feross]

Okay, new version of standard just released that support ES8, including async and await. Enjoy!

8.3.0.

[feross]

https://twitter.com/feross/status/781564129303638018