added tzdata as a requirement as noted in the ZoneInfo docs:

The zoneinfo module does not directly provide time zone data, and instead pulls time zone information from the system time zone database or the first-party PyPI package tzdata, if available. Some systems, including notably Windows systems, do not have an IANA database available, and so for projects targeting cross-platform compatibility that require time zone data, it is recommended to declare a dependency on tzdata. If neither system data nor tzdata are available, all calls to ZoneInfo will raise ZoneInfoNotFoundError.

Author: Alejandro Casanovas

requirements-dev.txt

@@ -4,6 +4,7 @@ python-dateutil>=2.7
 tzlocal>=5.0
 beautifulsoup4>=4.0.0
 stringcase>=1.2.0
+tzdata>=2023.4
 Click>=7.0
 pytest>=3.9.0
 twine>=1.12.0

requirements.txt

@@ -3,4 +3,5 @@ requests_oauthlib>=1.2.0
 python-dateutil>=2.7
 tzlocal>=5.0
 beautifulsoup4>=4.0.0
-stringcase>=1.2.0
+stringcase>=1.2.0
+tzdata>=2023.4