django-2.0: Shift to resolvers from urlresolvers.

The old name is deprecated.

zproject/jinja2/__init__.py

@@ -3,7 +3,7 @@ from typing import Any
 
 from django.contrib.staticfiles.storage import staticfiles_storage
 from django.template.defaultfilters import slugify, pluralize
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils import translation
 from jinja2 import Environment