* support kotlin

* fix unit test

* fix scala

* add plugin, fix doc

* Do not use empty data class

* update

* update

* add unit test.
remove tostring

* update

* update

* update

* update

* refactor

* add unit test

* support option  any where.
https://github.com/kobylynskyi/graphql-java-codegen/issues/415

* add task  with kotlin in gradle

* 🚀 supportScalaOption for primitive type

* fix

* add unit test for scala Option

* change var name

* Complete Scala test

* For kotlin, 'getUseOptionalForNullableReturnTypes' is ignored, which is compatible with the nullable semantics of any graphql.

* add unit test