That's not depends on me!
We only use the Ubuntu PPA recommended by the Official Nginx site, I don't know when they will update this package.
Can you tell us what new features are you missing?
If your bussiness depends on this, you can always set Webinoly to use the "mainline" nginx branch that surely has a newer versión available, it's pretty easy, just read the Webinoly docs.
Regards.