• Better handing of proto identifiers that start with underscores and numbers #947 #954
• Added CMake based build for platforms with SwiftPM #957
• Use withContiguousStorageIfAvailable for String encoding in BinaryEncoder #949
• Make setting a repeated extension field to [] clear it #966
• Declare the MessageExtensions with the correct visibility. #969
• Support for new Proto3 optional (this needs a protoc from protocolbuffers/protobuf v3.12.0 (or later)) #978
• Provide some more map helpers in the plugin library like the C++ Descriptor. #983
• Move the SwiftProtobuf.xcodeproj build settings into xcconfig files #986