Scheduled weekly dependency update for week 44 (#222)

* Update aioredis from 0.3.3 to 0.3.4

* Update cryptography from 2.1.1 to 2.1.2

Author: pyup.io bot

requirements-dev.txt

@@ -3,8 +3,8 @@ coverage==4.4.1
 sphinx==1.6.5
 pep257==0.7.0
 -e .
-aioredis==0.3.3
-cryptography==2.1.1
+aioredis==0.3.4
+cryptography==2.1.2
 pynacl==1.1.2
 pytest-aiohttp==0.1.3
 pytest-cov==2.5.1