Fix #163 - disable gmm

see https://docs.gradle.org/current/userguide/publishing_gradle_module_metadata.html#sub:disabling-gmm-publication

Author: oshai

build.gradle.kts

@@ -2,7 +2,7 @@ import org.jetbrains.dokka.gradle.DokkaTask
 import java.util.*
 
 plugins {
-    kotlin("multiplatform") version "1.4.10"
+    kotlin("multiplatform") version "1.4.31"
     id("com.jfrog.bintray") version "1.8.4"
     id("com.jfrog.artifactory") version "4.17.2"
     id("org.jetbrains.dokka") version "0.10.0"
@@ -35,6 +35,11 @@ tasks {
     }
 }
 
+// see issue #163
+tasks.withType<GenerateModuleMetadata> {
+    enabled = false
+}
+
 kotlin {
     metadata {
         mavenPublication {