Fix import

docs/changelog.rst

 CHANGELOG
 =========
 
-1.2.2(2021-03-28)
+1.2.3(2021-03-28)
 -----------------
 
 - Bugfix:

menu_generator/__init__.py

 __author__ = 'Milton Lenis'
 __description__ = 'A straightforward menu generator for Django'
-__version__ = '1.2.2'
+__version__ = '1.2.3'
 
 default_app_config = 'menu_generator.apps.MenuAppConfig'

menu_generator/menu.py

 import copy
 
 import django
-from django.core.exceptions import ImproperlyConfigured, Resolver404
+from django.core.exceptions import ImproperlyConfigured
+from django.urls import Resolver404
 from .utils import get_callable, parse_url, path_startswith
 
 if django.VERSION >= (1, 10):  # pragma: no cover