inc version to 2.4.0

Author: Holger Brandl

src/main/kotlin/kscript/app/Kscript.kt

@@ -20,7 +20,7 @@ import kotlin.system.exitProcess
  * @author Holger Brandl
  */
 
-const val KSCRIPT_VERSION = "2.3.0"
+const val KSCRIPT_VERSION = "2.4.0"
 
 val selfName = System.getenv("CUSTOM_KSCRIPT_NAME") ?: "kscript"