- Add support for following types:
- NULL
- LIST
- MAP
- ENUM
- Add support for following types:
- nested object
- pig
https://pig.apache.org/docs/r0.16.0/basic.html#Data+Types+and+More
- protobuf
https://developers.google.com/protocol-buffers/docs/proto3#packages
- avro
https://avro.apache.org/docs/1.8.1/spec.html#schema_primitive