Return error on unknown object key #161
Description
I would like the gojay codegen tool to have a flag to return a error if an unknown field is encountered.
For example
func (m *Message) UnmarshalJSONObject(dec *gojay.Decoder, k string) error {
switch k {
case "type":
return dec.String(&m.Type)
case "message":
return dec.String(&m.Message)
/////// New code
default:
return errUnknownField
}
//////
}