support for proto3

[sxwebdev]

I try to run a command and I get the following error

protoc \
        --go_out=:pb \
        --go-grpc_out=:pb \
        --struct-transformer_out=package=transform,debug=false,goimports=true,paths=import:. \
        ./proto/user.proto
proto/user.proto: is a proto3 file that contains optional fields, but code generator protoc-gen-struct-transformer hasn't been updated to support optional fields in proto3. Please ask the owner of this code generator to support proto3 optional.--struct-transformer_out: 
make: *** [genproto] Error 1

proto file

syntax = "proto3";
package user;

import "proto/options/annotations.proto";

option go_package = ".;pb";

option (transformer.go_repo_package) = "store";
option (transformer.go_protobuf_package) = "pb";
option (transformer.go_models_file_path) = "./internal/store/models.go";

message User {
  option (transformer.go_struct) = "User";
  string id = 1;
  string first_name = 2;
  string last_name = 3;
  optional string patronymic = 4;
}