noamkremen

PR #709 breaks python 3.6.1 compatibility

6

https://github.com/pyca/pynacl/pull/709 src/nacl/bindings/crypto_generichash.py:14 ` from typing import NoReturn, TypeVar ` NoReturn was introduced in python 3.6.2, on 3.6.1 fails with: ` ImportError: cannot import name ‘NoReturn’ `