Log Message:
py-tzlocal: updated to 5.3

5.3 (2025-02-13)

- Now supports Python 3.9 to 3.13, and no longer requires backports.zoneinfo.
- Debian is for some reason removing support for /etc/timezone, which is bad,
  because that's the only place where the timezone is  stated in plain text,
  and what's worse, they don't delete it. So we can't trust it now,
  so when we have multiple configs, we are forced to just ignore it.
- Attempts to return a ZoneInfo object also for UTC.