Support Django 4.x for replace deprecated features

Author: heavenshell

tests/models.py

@@ -12,7 +12,7 @@
 # Django
 from django.conf import settings
 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 # App
 from timezone_utils.fields import LinkedTZDateTimeField, TimeZoneField

timezone_utils/fields.py

@@ -13,7 +13,7 @@
 from django.core.exceptions import ValidationError
 from django.db.models.fields import DateTimeField, CharField
 from django.utils.timezone import get_default_timezone, is_naive, make_aware
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 # App
 from timezone_utils import forms

timezone_utils/forms.py

@@ -8,8 +8,11 @@
 # Django
 from django.core.exceptions import ValidationError
 from django.forms import CharField
-from django.utils.encoding import force_text
-from django.utils.translation import ugettext_lazy as _
+try:
+    from django.utils.encoding import force_str as force_text
+except ImportError:
+    from django.utils.encoding import force_text
+from django.utils.translation import gettext_lazy as _
 
 __all__ = ('TimeZoneField', )