Merge pull request #21 from cunla/master

Django4 support

Author: Lukas Vinclav

admin_numeric_filter/forms.py

@@ -1,6 +1,6 @@
 from django import forms
 from django.forms import Media
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 
 NUMERIC_FILTER_CSS = 'css/admin-numeric-filter.css'