Minimal working version

* Upgrade dependencies
* Fix ugettext
* Fix bad urls

stock/models.py

@@ -24,7 +24,7 @@
 #
 
 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.urls import reverse
 from django.conf import settings
 

stock/views.py

@@ -37,7 +37,7 @@ from django.views.generic.edit import (
     FormMixin,
     BaseFormView,
 )
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django import forms
 from django.http import HttpResponseRedirect, HttpResponse
 from django.forms.models import modelform_factory