Update cldr to 2.0.1.
buildInter: Prevent property names with dashes from producing invalid JavaScript (CLDR 24 adds some new calendar ids such as 'islamic-umalqura').
Don't rely on cldr.extractDefaultDateTimePatternName anymore (no longer exists), just use the medium format.
Implement the 'z' format token in an extremely hacky way.
Start writing some tests.