Publish only release builds to Gradle plugin portal

build.gradle

@@ -178,8 +178,8 @@ task gradlePluginCheck {
 
 task gradlePluginUpload {
     dependsOn gradle.includedBuild('kotlin-native-gradle-plugin').task(':bintrayUpload')
-    // Don't publish dev builds to the plugin portal.
-    if (konanVersionFull.meta != MetaVersion.DEV) {
+    // Publish releases to the plugin-portal too.
+    if (konanVersionFull.meta == MetaVersion.RELEASE) {
         dependsOn gradle.includedBuild('kotlin-native-gradle-plugin').task(':publishPlugins')
     }
 }