Minimal working version

* Upgrade dependencies
* Fix ugettext
* Fix bad urls

com/views.py

@@ -28,7 +28,7 @@ from django.http import HttpResponseRedirect
 from django.views.generic import ListView, DetailView, View
 from django.views.generic.edit import UpdateView, CreateView, DeleteView
 from django.views.generic.detail import SingleObjectMixin
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.urls import reverse, reverse_lazy
 from django.core.exceptions import ValidationError
 from django.utils import timezone