Fixed example app to run in Django 2.1

example/example/settings.py

@@ -41,7 +41,7 @@ STATICFILES_FINDERS = (
     'django.contrib.staticfiles.finders.AppDirectoriesFinder',
 )
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
     'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',

example/example/urls.py

@@ -1,11 +1,11 @@
 from django.conf.urls import include, url
 from django.contrib import admin
-from django.core.urlresolvers import reverse_lazy
+from django.urls import reverse_lazy
 from django.views.generic import RedirectView
 
 admin.autodiscover()
 
 urlpatterns = [
-    url(r'^admin/', include(admin.site.urls)),
+    url(r'^admin/', admin.site.urls),
     url(r'^$', RedirectView.as_view(url=reverse_lazy('admin:index'), permanent=False)),
 ]