[heycam/webidl] Async iterators should be allowed to have an optional return() algorithm (#804)

So that we can implement https://streams.spec.whatwg.org/#rs-asynciterator-prototype-return

We can do the boilerplate of returning { value: argumentPassed, done: true } for you.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/heycam/webidl/issues/804