Add ZoneInfo backport for Python3.8 support

3.8 is EOL in October but easy enough to support it until then.

catchpy/consumer/models.py

@@ -7,7 +7,10 @@
 from django.db.models import CASCADE, CharField, DateTimeField, ForeignKey, Model, OneToOneField
 from django.db.models.signals import post_save
 from django.dispatch import receiver
-from zoneinfo import ZoneInfo
+try:
+    from zoneinfo import ZoneInfo
+except ImportError:
+    from backports.zoneinfo import ZoneInfo
 
 
 User = get_user_model()

catchpy/requirements/base.txt

@@ -9,3 +9,4 @@ python-dotenv>=1.0.0
 requests>=2.31.0
 django-log-request-id>=2.1.0
 django-cors-headers>=4.2.0
+backports.zoneinfo;python_version<"3.9"

pyproject.toml

@@ -34,10 +34,10 @@ dependencies = [
     "PyLD>=2.0.3, <3.0.0",
     "python-dateutil>=2.8.2",
     "python-dotenv>=1.0.0",
-    "pytz>=2023.3",
     "requests>=2.31.0",
     "django-log-request-id>=2.1.0",
     "django-cors-headers>=4.2.0",
+    "backports.zoneinfo;python_version<'3.9'",
 ]
 
 [tool.hatch.version]