Merge pull request #252 from fantix/pyup-update-quart-0.5.0-to-0.6.0

Update quart to 0.6.0

Author: wwwjfy

requirements_dev.txt

@@ -11,7 +11,7 @@ sanic==0.7.0
 aiohttp==3.3.1
 tornado==4.5.3
 async_generator==1.9.0
-quart==0.5.0
+quart==0.6.0;python_version>="3.6"
 
 # tests
 coverage==4.5.1