Any plans to support json_serializable builder

[gustavomonarin]

Currently https://pub.dev/packages/json_serializable returns an unsupported type error:

[SEVERE] json_serializable:json_serializable on lib/oxxxx_model.dart:
Error running JsonSerializableGenerator
Could not generate `fromJson` code for `foundingDate`.
None of the provided `TypeHelper` instances support the defined type.
package:origins_app/origin_model.dart:60:19
   ╷
60 │   final LocalDate foundingDate;
   │                   ^^^^^^^^^^^^
   ╵