@unhuman -
I created the branch 1.3 at that SHA. Given that version 1.3.X of the SDK is at the end of it’s support period, I am not sure I would go down that direction for new development. Most all of the development time and support is going into 2.1.X of the SDK and as new features are being added to Couchbase server, they will not likely be back-ported to the 1.3.x version of the client.
-Jeff