bump django version to 2.1.5

dc4719d2 · Jelle van der Waa · d82bfa19 · dc4719d2
Commit dc4719d2 authored Nov 17, 2018 by Jelle van der Waa 🚧
--- a/requirements.txt
+++ b/requirements.txt
 -e git+git://github.com/fredj/cssmin.git@master#egg=cssmin
-Django==1.11.18
+Django==2.1.5
 IPy==0.83
 Markdown==2.6.10
 MarkupSafe==0.23