HyperwalletList<T>.getData() returns null for "List" endpoints if there were no entries in response

[irina-turova]

We are migrating to REST API v4 and, therefore, switching from library version 1.4.2 to 2.4.3.

With1.4.2 and REST API v3, the request to the "List users" endpoint returns HyperwalletList and its getData() property returns an empty list if no users were found.

Now, with 2.4.3 and REST API v4 in the same situation, getData() returns null. It's not expected for "List" endpoints

Does changing it to an empty list again make sense, or does the "empty list logic" break the new pagination mechanism?