Incorrect AppState type in resolveFields

[chrisvxd]

The appState parameter passed to resolveFields() is not aware of user data shape type (i.e. root props), and the user must currently cast the type.

{
  resolveFields: (_, { appState }) => {
    const rootProps = appState.data.root.props as RootProps;
    
    return {}
  }
}