Calendrical version 0.13.0

[0.13.0] — 2026-07-15

Changed

• Calendrical.TimeZone.tz_database/0 resolves the database from the :elixir :time_zone_database configuration first, then falls back to detecting a loaded implementation (Tz preferred over Tzdata). The tzdata dependency is removed entirely; tz is the database used for calendrical's own dev and test, and neither is forced on consumers. Case-insensitive IANA name canonicalisation still works when a consumer loads tzdata (the only database exposing a zone list); otherwise zone names resolve exact-case.