Add coverage to the dev dependecies

3 jobs for go-three in 1 minute and 48 seconds
Name Stage Failure
Go-py3.6 Test
  Applying go.0002_auto_20180523_2351... OK
Applying go.0003_auto_20180524_0003... OK
Applying sessions.0001_initial... OK
Applying sites.0001_initial... OK
Applying sites.0002_alter_domain_unique... OK
$ echo "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('root', '', 'root') " | python shell
$ coverage run --source=go --omit=*migrations/*,*,*,*,*,*,*,*.pyc,*templates/*,*static/* test
/bin/bash: line 109: coverage: command not found
ERROR: Job failed: exit code 1
Go-py3.4 Test
- ['David', 'Haynes']
+ ['', '']

Ran 76 tests in 11.342s

FAILED (failures=1)
Destroying test database for alias 'default'...
ERROR: Job failed: exit code 1