django2.2: relpace django.core.urlresolvers by django.urls

core/views/files.py

@@ -32,7 +32,7 @@ from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 from django.http import HttpResponse
 from wsgiref.util import FileWrapper
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.core.exceptions import PermissionDenied
 from django import forms