Fix return type of `Document.SuccessDocument.including()`
Fixed:
- In 2.5.0,
Document.SuccessDocument.including()returned aDocument. That has been fixed in 2.5.1 to return aDocument.SuccessDocument.
Fixed:
Document.SuccessDocument.including() returned a Document. That has been fixed in 2.5.1 to return a Document.SuccessDocument.