Running zengine on Python 3.5+

[PetrMixayloff]

I'm trying to run this project on python 3.5 and get error on pika=0.10.0 module on
class LibevConnection(BaseConnection): ... self.async = None

It looks like that python 3.4 have not async/await syntax, but 3.5+ got it.
So, is it impossible to run this project on python 3.5+ versions?
I tried to update pika for last version, and there is not class TornadoConnection, that is imported in ws_to_queue.py