gogoprotobuf is a fork of golang/protobuf with extra code generation features. With this new release comes a new internal library version. This means any newly generated *pb.go files generated with the v1.3.0 library will not be compatible with the old library version (v1.2.1). However, current *pb.go files (generated with v1.2.1) should still work with the new library. Please make sure you manage your dependencies correctly when upgrading your project. If you are still using v1.2.1 and you...