0.12.1

• Update to KSP 1.5.21-1.0.0-beta07.
• Fix: Previously if you had a @JsonClass-annotated Java file with a custom generator, moshi-ksp would error
  out anyway due to it not being a Kotlin class. This is now fixed and it will safely ignore these files.
• Fix: Generate missing @OptIn(ExperimentalStdLibApi::class) annotations in moshi-sealed when object
  adapters are used, as we use Moshi's reified addAdapter extension.

Thanks to @gabrielittner for contributing to this release!