Upgrade Django version

Author: mattiagiupponi

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name="geonode-user-messages",
-    version="2.0.2",
+    version="2.0.3",
     author="Eldarion",
     author_email="[email protected]",
     description="Fork of user-messages: a reusable private user messages application for Django",

user_messages/forms.py

@@ -3,7 +3,7 @@
 from django.core.exceptions import ValidationError
 
 from django.contrib.auth import get_user_model
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from user_messages.models import Message
 

user_messages/models.py

@@ -6,7 +6,7 @@
 from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Group
 from django.utils import timezone
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from user_messages.managers import ThreadManager, MessageManager
 from user_messages.utils import cached_attribute

user_messages/signals.py

@@ -1,4 +1,4 @@
 from django.dispatch import Signal
 
 
-message_sent = Signal(providing_args=["message", "thread", "reply"])
+message_sent = Signal()