Support JVM target versions up to 12

#KT-26240 Fixed

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.kt

@@ -62,7 +62,7 @@ class K2JVMCompilerArguments : CommonCompilerArguments() {
     @Argument(
         value = "-jvm-target",
         valueDescription = "<version>",
-        description = "Target version of the generated JVM bytecode (1.6 or 1.8), default is 1.6"
+        description = "Target version of the generated JVM bytecode (1.6, 1.8, 9, 10, 11 or 12), default is 1.6"
     )
     var jvmTarget: String? by NullableStringFreezableVar(JvmTarget.DEFAULT.description)