Rename root MPP module and publish the JVM JAR within

* Rename the JVM module: empty suffix -> '-jvm';
* Rename the root MPP module: '-native' -> empty suffix;
* Publish the JVM JAR and POM in the root MPP module, so
  that consumers who can't read Gradle module metadata, such
  as Maven or old Gradle versions, get the JVM resolution
  result from the root MPP module.

Author: h0tk3y

gradle/publish-bintray.gradle

@@ -91,6 +91,10 @@ publishing {
     }
 }
 
+tasks.matching { it.name == "generatePomFileForKotlinMultiplatformPublication"}.configureEach {
+    dependsOn(tasks["generatePomFileForJvmPublication"])
+}
+
 task publishDevelopSnapshot() {
     def branch = System.getenv('currentBranch')
     if (branch == "develop") {