Scheduled weekly dependency update for week 11 (#140)

* Update cryptography from 2.1.4 to 2.2

* Update aiohttp from 3.0.7 to 3.0.9

Author: pyup.io bot

requirements-dev.txt

@@ -10,6 +10,6 @@ aiopg[sa]==0.13.2
 aioredis==1.1.0
 hiredis==0.2.0
 passlib==1.7.1
-cryptography==2.1.4
-aiohttp==3.0.7
+cryptography==2.2
+aiohttp==3.0.9
 pytest-aiohttp==0.3.0