List and Set were doing a comparison in their can_cast_type functions that assumed the List[T] variant of the type was being used instead of the list[T] variant. This PR makes the check compatible with both of these variants. It also adds a unit test for the Set type, which had been missing.
ListandSetwere doing a comparison in theircan_cast_typefunctions that assumed theList[T]variant of the type was being used instead of thelist[T]variant. This PR makes the check compatible with both of these variants. It also adds a unit test for theSettype, which had been missing.