Add ability to call useGetList without pagination, sort, or filter params

[fzaninotto]

Problem

useGetList requires that users pass sort, pagination, and filter params. It's cumbersome.

Solution

Use sensible defaults

-const { ids, data, loaded } = useGetList('posts', { page: 1, perPage: 25 }, { field: 'id', order: 'DESC' }, {});
+const { ids, data, loaded } = useGetList('posts');

[djhi]

🎉