Fix Django 2.0: use new url syntax (#182)

.travis.yml

@@ -52,12 +52,6 @@ matrix:
     - env: TOXENV=py36-djmaster
       python: 3.6
   allow_failures:
-    - env: TOXENV=py34-dj20
-      python: 3.4
-    - env: TOXENV=py35-dj20
-      python: 3.5
-    - env: TOXENV=py36-dj20
-      python: 3.6
     - env: TOXENV=py34-djmaster
       python: 3.4
     - env: TOXENV=py35-djmaster

tests/urls.py

@@ -1,9 +1,6 @@
-from django.conf.urls import include, url
-
-# Uncomment the next two lines to enable the admin:
+from django.conf.urls import url
 from django.contrib import admin
-admin.autodiscover()
 
 urlpatterns = [
-    url(r'^admin/', include(admin.site.urls)),
+    url(r'^admin/', admin.site.urls),
 ]