Prisma

is there a bug with `graphql-playground` and fragments? something like:

```
fragment characterFields on Character {
  name
}

query {
  character {
    ...characterFields
  }
}
```

is being marked as an error by `graphql-playground`. The query actually works, it's not marked as an error in graphiql

thanks I could reproduce this, can you please report it here: <https://github.com/graphcool/graphql-playground> :slightly_smiling_face:

<https://github.com/graphcool/graphql-playground/issues/371>