Empty list in json string causes err in j2p

[horral]

Describe the bug

When there is a value of [] in json string for a repeated field in protobuf definition, j2p will return err.

To Reproduce

func main() { content := syntax = "proto3";

package pb3;
option go_package = "pb/example";

message ExampleScalarsReq {
optional string Msg = 1;
optional double Cookie = 2;
string Path = 3;
repeated string Query = 4;
bool Header = 5;
int64 Code = 6;
}

message ExampleScalarsResp {
string Msg = 1;
optional double Cookie = 2;
int32 Status = 3;
optional bool Header = 4;
int64 Code = 5;
double Subfix = 6;
}

service TestService {
rpc ScalarsMethodTest(ExampleScalarsReq) returns (ExampleScalarsResp);
}`
opts := proto.Options{}
descriptor, err := opts.NewDesccriptorFromContent(context.Background(), "bugreport.proto", content, map[string]string{})
if err != nil {
panic(err)
}
typeDescriptor := descriptor.Methods()["ScalarsMethodTest"].Input()

input := []byte(`{"Msg": "msg", "Query": [], "Header": false, "Code": 0}`)
cv := j2p.NewBinaryConv(conv.Options{})
out, err := cv.Do(context.Background(), typeDescriptor, input)
if err != nil {
	panic(err)
}
fmt.Println(string(out))

}
`

Expected behavior

Empty list in json can be ignored or well handled when converting to protobuf.

Screenshots

Version:

v0.4.4

Environment:

The output of go env.

Additional context

Remove the "Query": [] or put a value in the list, then it will return without error