Cldr version 2.37.0

Bug Fixes

• Fixes Cldr.Locale.parent/1 to use :und as the ultimate parent rather than the default locale. This brings closer conformance to the CLDR specification.

Enhancements

• Upgrade to CLDR 43 data.

• Locale data is now versioned. If a locale file is found but if has no version (data prior to this release) or a version that does not match, the appropriate locale file is downloaded. This ensures locale files and ex_cldr are kept in sync. Closes #188.

• Changes Cldr.version/0 to return the version of CLDR data as a t:Version.t/0. This is then used to check the version of the locale data and forcing a download if the locale data is out of date for this release of ex_cldr.

• Adds Cldr.Locale.script_direction_from_locale/1 and MyApp.Cldr.Locale.script_direction_from_locale/1 to return :ltr (for left-to-right scripts) or :rtl (for right-to-left scripts). Closes #196. Thanks to @Doerge for the suggestion.

• Adds Cldr.Validity.Script.unicode_script_to_subtag/1 as public, undocumented function. This function is required by ex_cldr_person_names and may be documented in a future release. It maps between a unicode script name (like that returned by Unicode.script/1 in the unicode library) to the appropriate subtag used by CLDR.

• Unit data is now kept as Decimal not Ratio so :ratio is no longer a dependency here, or in ex_cldr_units.