Write Stream error not propagated

[pfrazee]

I found that if a createWriteStream() call was creating an error, the error wasn't getting pushed into the writestream. (I'm not 100% sure where the error was occurring, possibly in GRPC's encoding because it was some assertionerror.)

What I found was with https://github.com/andrewosh/hyperdrive-daemon-client/blob/master/index.js#L491 this line, if I removed the return and allowed the callback to be called, the error would correctly propagate. Any chance that's the correct behavior?