Update tzlocal requirement from <3.0,>=2.1 to >=2.1,<6.0

Updates the requirements on [tzlocal](https://github.com/regebro/tzlocal) to permit the latest version.
- [Changelog](https://github.com/regebro/tzlocal/blob/master/CHANGES.txt)
- [Commits](regebro/tzlocal@2.1...5.3)

---
updated-dependencies:
- dependency-name: tzlocal
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -35,7 +35,7 @@
     "python-magic>=0.4,<0.5",
     "ldap3>=2.2.4,<2.10",
     "pytz>=2021.3",
-    "tzlocal>=2.1,<3.0",
+    "tzlocal>=2.1,<6.0",
     "sentry-sdk[flask]>=2.0.0,<3.0.0",  # Replacing raven[flask]>=5.10,<7.0
     "requests>=2.7.0,<3.0",
     "boto3>=1.26,<2.0",