Upgrade to Django 2.1 (#710)

* Upgrade to Django 2.0

* more models

* i18n foo

* Update setup.py

* Fix Sentry exception PRETIXEU-JC

* Enforce slug uniqueness

* Import sorting

* Upgrade to Django 2.1

* Travis config

* Try to fix PostgreSQL failure

* Smaller test matrix

* staticfiles→static

* Include request in all authenticate() calls

src/pretix/base/views/js_catalog.py

@@ -1,7 +1,8 @@
 from django.utils import timezone
+from django.utils.translation.trans_real import DjangoTranslation
 from django.views.decorators.cache import cache_page
 from django.views.decorators.http import etag
-from django.views.i18n import get_javascript_catalog, render_javascript_catalog
+from django.views.i18n import JavaScriptCatalog, render_javascript_catalog
 
 # Yes, we want to regenerate this every time the module has been imported to
 # refresh the cache at least at every code deployment
@@ -18,6 +19,6 @@ js_info_dict = {
 @etag(lambda *s, **k: import_date)
 @cache_page(3600, key_prefix='js18n-%s' % import_date)
 def js_catalog(request, lang):
-    packages = ['pretix']
-    catalog, plural = get_javascript_catalog(lang, 'djangojs', packages)
-    return render_javascript_catalog(catalog, plural)
+    c = JavaScriptCatalog()
+    c.translation = DjangoTranslation(lang, domain='djangojs')
+    return render_javascript_catalog(c.get_catalog(), c.get_plural())

src/pretix/base/views/redirect.py

@@ -1,8 +1,8 @@
 import urllib.parse
 
 from django.core import signing
-from django.core.urlresolvers import reverse
 from django.http import HttpResponseBadRequest, HttpResponseRedirect
+from django.urls import reverse
 
 
 def redir_view(request):