Update flake8 from 2.6.0 to 3.3.0

pyup-bot · pyup-bot · commit a0fe76bbf4fd · 2017-05-24T12:20:49.000+02:00
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==9.0.1
 bumpversion==0.5.3
 wheel==0.29.0
 watchdog==0.8.3
-flake8==2.6.0
+flake8==3.3.0
 tox==2.3.1
 coverage==4.1
 Sphinx==1.4.8
