HTTP client will return a Promise.
HTTP client will return a Promise.

The original idea was to have a Supply that would include anything
that was push-promised in HTTP/2. But that isn't such a great API for
it, as the default for `await` is to tap the Supply and get the final
value produced, which would not be what is requested at all! So, we'll
do something more explicit for push promises when we get there.

croservices/cro,croservices/cro