Upgrade to Django 2.1 using pip-tools

Closes #88

apps/profiles/urls.py

@@ -2,6 +2,8 @@ from django.conf.urls import url
 
 from . import views
 
+app_name = 'profiles'
+
 urlpatterns = [
     url(
         regex=r'^~redirect/$',
@@ -18,4 +20,4 @@ urlpatterns = [
         view=views.UserUpdateView.as_view(),
         name='update'
     ),
-]
+]