v1.4.2

What's Changed

• Update the country list to CLDR 49.
  • TF: "French Southern Territories" → "French Southern and Antarctic Lands"
  • HM: "Heard & McDonald Islands" → "Heard Island & McDonald Islands"
  • SH: "St. Helena" → "St. Helena, Ascension & Tristan da Cunha"
• Bump the minimum Go version to 1.24 and modernize the code.
• Format no longer adds empty ``regionsandlocal_regions` keys to its JSON output (for example, FormatHandler responses).
• Use a value receiver for Format.PostalCodeValidationPattern(), matching the other methods.
• Use a value receiver for FormatHandler.
• Test on Go 1.27.

Full Changelog: v1.4.1...v1.4.2