Merge pull request #322 from fantix/pyup-update-aiohttp-3.4.1-to-3.4.2

Update aiohttp to 3.4.2

Author: wwwjfy

requirements_dev.txt

@@ -6,7 +6,7 @@ wheel==0.31.1
 cryptography==2.3.1
 psycopg2-binary==2.7.5
 sanic==0.7.0
-aiohttp==3.4.1
+aiohttp==3.4.2
 tornado==4.5.3
 async_generator==1.10
 quart==0.6.6;python_version>="3.6"