Update gunicorn from 20.0.0 to 20.0.4

pyup-bot · pyup-bot · commit f8798a787541 · 2019-11-27T05:57:20.000+01:00
diff --git a/requirements-docker.txt b/requirements-docker.txt
@@ -1,4 +1,4 @@
 -r requirements.txt
 gevent==1.4.0
-gunicorn==20.0.0
+gunicorn==20.0.4
 psutil==5.6.5
