0.13.0

• Add the following APIs:
  • toCrossJSON
  • toCrossJSONAsync
  • toCrossJSONStream
  • fromCrossJSON
• Add support for ReadableStream in async modes
• Add support for AsyncIterable in async and streaming modes
• Add Symbol.toStringTag and Symbol.isConcatSpreadable in serialized properties
• Deprecate MethodShorthand and ArrayPrototypeValues in Feature
• Rework Iterable serialization output
• Dedupe hidden references
• Fix Plugin API-related behavior
• Remove Plugin API's isIterable