Wrong message field type in generated proto file for a named type of []byte

[aantelov87]

Right now I am doing something like this:

type OrderID []byte

type Order struct {
	ID          OrderID
	description string
}

The proto generated by proteus was:

message Order {
	option (gogoproto.goproto_getters) = false;
	option (gogoproto.typedecl) = false;
	repeated uint32 id = 1 [(gogoproto.casttype) = "byte", (gogoproto.customname) = "ID"];
}

The expected output:

message Order {
	option (gogoproto.goproto_getters) = false;
	option (gogoproto.typedecl) = false;
	repeated bytes id = 1 [(gogoproto.casttype) = "OrderID", (gogoproto.customname) = "ID"];
}