bug 1518653: Update to Django 1.11.18
bug 1518653: Update to Django 1.11.18

* Django 1.11.16 → 1.11.18: Addresses GeoDjango bug, Python 3.7 compat,
  and a security issue in the default 404 handler (which Kuma replaces)

jwhitlock/kuma,a2sheppy/kuma,mozilla/kuma,jwhitlock/kuma,mozilla/kuma,escattone/kuma,Elchi3/kuma,a2sheppy/kuma,Elchi3/kuma,jwhitlock/kuma,SphinxKnight/kuma,escattone/kuma,SphinxKnight/kuma,jwhitlock/kuma,Elchi3/kuma,SphinxKnight/kuma,Elchi3/kuma,SphinxKnight/kuma,a2sheppy/kuma,mozilla/kuma,SphinxKnight/kuma,Elchi3/kuma,jwhitlock/kuma,escattone/kuma,mozilla/kuma,mozilla/kuma,a2sheppy/kuma,SphinxKnight/kuma,a2sheppy/kuma