Update gunicorn from 19.7.1 to 19.9.0

pyup-bot · pyup-bot · commit ea753ce5ad3c · 2018-11-05T20:46:39.000+01:00
diff --git a/requirements-docker.txt b/requirements-docker.txt
@@ -1,3 +1,3 @@
 -r requirements.txt
 gevent==1.3.7
-gunicorn==19.7.1
+gunicorn==19.9.0
