If you include a default empty `data` option in your JSON API response,
many frontend frameworks will ignore your `related` link that could be
used to load relationship records, and will instead treat the
relationship as empty.
This adds a `lazy_load_data` option which will:
* stop the serializer attempting to load the data and;
* exclude the `data` key from the final response
This allows you to lazy load a JSON API relationship.
This allows specifying a `:links` option to a has_many/has_one
relationship, which means you can specify `self` or `related` links as
per the JSON API spec (these are often useful for not loading all
associated objects in a single payload)
