Enable MPP compatibility metadata variant

Author: h0tk3y

gradle.properties

@@ -16,6 +16,7 @@ kotlin.incremental.multiplatform=true
 org.gradle.jvmargs=-Xmx2g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
 
 kotlin.mpp.enableGranularSourceSetsMetadata=true
+kotlin.mpp.enableCompatibilityMetadataVariant=true
 
 # Workaround for Bintray treating .sha512 files as artifacts
 # https://github.com/gradle/gradle/issues/11412