Recursive types are not supported

**Describe the bug**
I have a recursive input (not my doing, I didn't invent this schema), and that breaks the generation:

```graphql
input PremiseProduct_FilterInput {
  and: [PremiseProduct_FilterInput]
  not: PremiseProduct_FilterInput
  or: [PremiseProduct_FilterInput]
  id: IDOperator
}
```

Error: depth limit exceeded: 51