Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed in the 2016.1.3 release of the integration (in addition to upgrading to the new Unreal build).

Unreal Engine 4.11/4.12/4.13 - Wwise 2016.1.3

• WG-30993 Fixed: Remove explicit LoadLibrary on XAudio 2.7.
• WG-31015 Fixed: Link with the Recorder plug-in.