Excluding empty values

[barnjamin]

While comparing DryrunRequest output across multiple SDKs, I noticed Go omits some empty values that js/python do not.

Go | JS | Python

I'm not sure this is a bug or even important but it does make the resulting msgp output different depending on which SDK is being used.

[winder]

So far we haven't considered re-serialization as part of the API contract. In go you would have access to these objects and they would have the correct zero values.

Do you think it's important that they show up in the re-serialized objects?

[barnjamin]

Not particularly, just raised it here so it was on the radar