Untagged Unwrapped Single Cases

[daniellittledev]

Implements: Add Support for Untagged Unwrapped Single Cases #135

This PR would add support for Untagged Unwrapped Single Field Cases.

To support Deserialization it assumes all cases have unique types so finding the case if unambiguous.

This supports a fixed set of primitive types:

• Numbers
• Booleans
• Strings
• Dates (as strings)
• Arrays
• Objects