1.9.0

• New: Kotlin 1.5.10.
• New: Previously deprecated API to interop with Java reflection and Mirror API have been un-deprecated and marked with @DelicateKotlinPoetApi annotation.
• New: CodeBlock.Builder.withIndent helper function.
• New: Allow changing initializers and default values in ParameterSpec.Builder and PropertySpec.Builder after they were set.
• New: MemberName.isExtension property that instructs KotlinPoet to always import the member, even if conflicting declarations are present in the same scope.
• Fix: Escape member names that only contain underscores.
• Fix: Always emit an empty primary constructor if it was set via TypeSpec.primaryConstructor.