Breaking changes:

• Deprecate TimeZone serialization (#576).

Additions:

• Add orNull functions for non-throwing construction of datetime entities (#68).
• Add parseOrNull extension functions for non-throwing attempts at parsing (#508).
• Introduce LocalIsoWeekDate for representing ISO week dates (#603).
• Introduce functions for finding the next or previous date with the given day-of-week (#129).

Tweaks and fixes:

• Fix bugs in Instant.until and Instant.periodUntil (#534).
• Always output seconds in the DateTimeComponents.Formats.RFC_1123 format (#608).
• On Kotlin/Native for Windows, whenever DST transitions are turned off by the user, the current system time zone is now fixed-offset (#575).