CI: Update tests for Django 2.0

7 jobs for master in 40 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #33721
py27-django110

00:00:21

89.0%
passed #33722
py27-django111

00:00:21

89.0%
passed #33720
py27-django18

00:00:21

89.0%
passed #33724
py36-django110

00:00:22

90.0%
passed #33725
py36-django111

00:00:16

90.0%
passed #33723
py36-django18

00:00:22

90.0%
passed #33726
py36-django20

00:00:16

90.0%