Update raven from 5.32.0 to 6.0.0

Author: pyup-bot

project/requirements/production.txt

@@ -12,4 +12,4 @@ django-storages-redux==1.3.2
 
 # Raven is the Sentry client
 # --------------------------
-raven==5.32.0
+raven==6.0.0