JSONValue.hash(into:)

Implement this method to conform to the Hashable protocol. The components used for hashing must be the same as the components compared in your type's == operator implementation. Call hasher.combine(_:) with each of these components.

• Important: In your implementation of hash(into:) , don't call finalize() on the hasher instance provided, or replace it with a different instance. Doing so may become a compile-time error in the future.
• Parameter hasher: The hasher to use when combining the components of this instance.