* [kotlin] add OffsetDateTime support * [kotlin] serializer add missing import * [kotlin] update pet projects and fix tests * [kotlin] update docs * [kotlin] update pet projects * [kotlin] update date-time * [kotlin] update pet project * [kotlin] update windows script
* Added new additional parameter to allow nullable api return types * Tweaking samples and .bat files I've added new .bat files for the kotlin-client to alllow windows-devs to re-generate required samples via windows-shell (for CI).