Scheduled weekly dependency update for week 46 (#113)

* Update coverage from 4.4.1 to 4.4.2

* Update aiohttp-session from 1.0.1 to 1.2.0

* Update aioredis from 0.3.4 to 0.3.5

* Update aiohttp from 2.3.1 to 2.3.2

Author: pyup.io bot

requirements-dev.txt

@@ -2,13 +2,13 @@
 flake8==3.5.0
 pytest==3.2.3
 pytest-cov==2.5.1
-coverage==4.4.1
+coverage==4.4.2
 sphinx==1.6.5
 pep257==0.7.0
-aiohttp-session==1.0.1
+aiohttp-session==1.2.0
 aiopg[sa]==0.13.1
-aioredis==0.3.4
+aioredis==0.3.5
 hiredis==0.2.0
 passlib==1.7.1
-aiohttp==2.3.1
+aiohttp==2.3.2
 pytest-aiohttp==0.1.3