stream: make async iteration stable
I think it's about time we make Readable
async iteration stable.
It has been around for a while - we have fixed a bunch of bugs so far, and I expect there will still be some. I do not expect major changes.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines