Consider how to avoid the need for an unwrap in PaginatedResult.next

[lawrence-forooghian]

The PaginatedResult type introduced in #9 is currently just copied from the JS type. I think the intention is that you check hasNext, and then, if it’s true, next will return a non-nil value. But the compiler doesn't know this, so you still have to unwrap next. Think about an API that avoids this; probably would be an enum where the "has next" case has an associated value that lets you load the non-optional next page.

┆Issue is synchronized with this Jira Story by Unito