* Revert "v7.12.0 release"
This reverts commit 073723cb4d41187f839fbb46565d109293fa22d7.
* set version to v7.13.0-SNAPSHOT
* update samples
* update doc
* [Kotlin] Properly document nonPublicApi CLI option
* [Kotlin] Respect parameter name of parent KSerializer to avoid miss-behavior
* [Kotlin] Introduce support for Kotlin Explicit API Mode for Kotlin-Client generator (resolves#16506)