generateInterfaces creates duplicate methods when implementing interface

[paulbakker]

interface Fruit {
  seeds: [Seed]
}

type Apple implements Fruit {
  seeds: [Seed]
}

type Seed {
  shape: String
}

public interface Fruit {
  List<ISeed> getSeeds();
}

public interface IApple extends Fruit {
  List<? extends ISeed> getSeeds();
}

See the IApple interface redefining getSeeds().

[npwork]

Fixed in PR: https://github.com/Netflix/dgs-codegen/pull/291/files