When you `use` a data provider, Sculpin currently expects you to `use` an array.
This should maybe change to be more flexible (string or array). Also, data
providers are provided via `data` and not `page`.

This is a failure on the documentation and in the examples as I don't currently
have anything using a data provider directly and always by way of the pagination
generator (I think?) so it is understandable that this would trip someone up.

Thanks for trying to work through it. :)