C++

• Minor multithreading bug fixes around shared mutable data objects
• Fixed error during parsing where a string with a colon followed by a number could be incorrectly interpreted as a decimal

Go

• Introduced error reporter API
• Add support for error reporter to Unmarshaller
• Introduced a “severity” field to UnmarshalError

Java

• Added logic for stabilizing tag numbers between generated versions of FhirProtos

Python

• Further loosened version constraints for protobuf and python-date-util package dependencies, allowing fluctuations in minor/patch version
• Added resource_utils module with functions for working with Bundles and ContainedResources
• Ported FhirPackage from Java for abstracting over FHIR JSON Implementation Guides
• Corrected bug where nested choice types that were primitive extensions were being incorrectly mapped during parsing