Here's a reference dummy project that is multiplatform (JVM and JS for now) with Gradle 6.5 and Kotlin 1.4 M2 showing how to link modules
Application (JVM) depends on Module (MP JS+JVM) which depends on Integration (JVM)
Hopefully this helps somebody. Contributions to further improve it are welcome
Thanks to Egor for helping with this!
https://github.com/JVAAS/kotlin-multiplatform-multi-module-setup