This patch release contains several bug fixes and improvements. Kotlin 1.7.20 is used by default.

Improvements

• Add @MustBeDocumented to certain annotations (#2059)
• Deprecate .isNullable in SerialDescriptor builder (#2040)
• Unsigned primitives and unsigned arrays serializers can be retrieved as built-ins (#1992)
• Serializers are now cached inside reflective lookup, leading to faster serializer retrieval (#2015)
• Compiler plugin can create enum serializers using static factories for better speed (#1851) (Kotlin 1.7.20 required)
• Provide a foundation for compiler plugin intrinsics available in Kotlin 1.8.0 (#2031)

Bugfixes

• Support polymorphism in Properties format (#2052) (thanks to Rodrigo Vedovato)
• Added support of UTF-16 surrogate pairs to okio streams (#2033)
• Fix dependency on core module from HOCON module (#2020) (thanks to Osip Fatkullin)