Fixed issue with sources missing from plugin and updated version

build.gradle.kts

@@ -34,7 +34,7 @@ object Extras {
     // set for the project
     const val description = "Gradle Plugin to manage various Gradle tasks, such as updating gradle and dependencies"
     const val group = "com.dorkbox"
-    const val version = "3.12"
+    const val version = "3.13"
 
     // set as project.ext
     const val name = "Gradle Utils"
@@ -61,6 +61,18 @@ licensing {
     }
 }
 
+sourceSets {
+    main {
+        java {
+            setSrcDirs(listOf("src"))
+
+            // want to include kotlin and java files for the source. 'setSrcDirs' resets includes...
+            // NOTE: if we DO NOT do this, then there will not be any sources in the "plugin sources" jar, as it expects only java
+            include("**/*.kt", "**/*.java")
+        }
+    }
+}
+
 repositories {
     gradlePluginPortal()
 }