TST: Bump pytz to 2023.3.post1

QuLogic · charris · commit a4f3c220a66f · 2024-01-20T11:06:06.000-07:00
This version fixes the DeprecationWarning in Python 3.12:
```
DeprecationWarning: datetime.datetime.utcfromtimestamp() is deprecated
and scheduled for removal in a future version. Use timezone-aware
objects to represent datetimes in UTC:
datetime.datetime.fromtimestamp(timestamp, datetime.UTC).
```
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -4,7 +4,7 @@ setuptools==59.2.0 ; python_version < '3.12'
 setuptools         ; python_version >= '3.12'
 hypothesis==6.81.1
 pytest==7.4.0
-pytz==2023.3
+pytz==2023.3.post1
 pytest-cov==4.1.0
 meson
 pytest-xdist
