Scheduled weekly dependency update for week 09 (#135)

* Update pytest from 3.3.2 to 3.4.1

* Update coverage from 4.4.2 to 4.5.1

* Update sphinx from 1.6.6 to 1.7.1

* Update aiohttp-session from 2.1.0 to 2.3.0

* Update aioredis from 1.0.0 to 1.1.0

* Update aiohttp from 2.3.9 to 3.0.6

requirements-dev.txt

@@ -1,15 +1,15 @@
 -e .
 flake8==3.5.0
-pytest==3.3.2
+pytest==3.4.1
 pytest-cov==2.5.1
-coverage==4.4.2
-sphinx==1.6.6
+coverage==4.5.1
+sphinx==1.7.1
 pep257==0.7.0
-aiohttp-session==2.1.0
+aiohttp-session==2.3.0
 aiopg[sa]==0.13.2
-aioredis==1.0.0
+aioredis==1.1.0
 hiredis==0.2.0
 passlib==1.7.1
 cryptography==2.1.4
-aiohttp==2.3.9
+aiohttp==3.0.6
 pytest-aiohttp==0.3.0