- minor release

Merge pull request #25 from davidvilla/fix/mimic-generic

Support making Mimics of Generic sub-classes

backward compatible fix for collections.abc deprecation

Merge pull request #14 from davidvilla/drop-python-3.5

Drop support for Python 3.5 as well

async is async_mode in python3.7 and newer

Python3.7 support fixed

tox.ini: add py36, remove py34

setup.packages avoids test packages

Fixes #25

Release 1.8.2