Overload result type of Object::get()
#839
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This PR changes the
Object::get()API to return an overloaded result typeV: Valueinstead ofJsValue, and automatically performs the downcasting on behalf of the caller. Since it's already a fallible API, this should generally end up being more concise and ergonomic.This is a backwards-incompatible change, however, and will require migration notes if we decide to go through with it.
(Replaces #795)