added support on django 3

setup.py

@@ -17,15 +17,15 @@
     version=__version__,
     description="django-constance integration for Wagtail CMS",
     long_description=open('README.rst').read(),
-    url='http://github.com/MechanisM/wagtail-constance',
+    url='http://github.com/Alex-Saduk/wagtail-constance',
     author='Eugene MechanisM',
     author_email='[email protected]',
     license='MIT',
     zip_safe = False,
     classifiers=[
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
-        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 4.0',
     ],
     keywords='django, config, constance',
     packages=find_packages(),

wagtailconstance/__init__.py

@@ -1 +1 @@
-__version__ = '0.0.2'
+__version__ = '0.0.3'

wagtailconstance/views.py

@@ -2,7 +2,7 @@
 from django.urls import reverse_lazy
 from django.utils.formats import localize
 from django.views.generic.edit import FormView
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from wagtail.admin import messages
 
 from constance import settings, LazyConfig

wagtailconstance/wagtail_hooks.py

@@ -1,15 +1,15 @@
-from django.conf.urls import url
 from django.urls import reverse
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from wagtail.core import hooks
 from wagtail.admin.menu import MenuItem
 from .views import ConstanceConfigView
+from django.urls import include, re_path
 
 
 @hooks.register('register_admin_urls')
 def register_admin_urls():
     return [
-        url(r'^config/', ConstanceConfigView.as_view(), name='constance_config'),
+        re_path(r'^config/', ConstanceConfigView.as_view(), name='constance_config'),
     ]