Refactor gradle option generation mechanism

Ensure there's a statically checked dependency on LanguageVersion and
JvmTarget, so that this information is updated automatically once a new
language version or a JVM target is added

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions.kt

@@ -62,7 +62,7 @@ interface KotlinJsOptions {
      var suppressWarnings: kotlin.Boolean
 
     /**
-     * Generate JS files for specific ECMA version)
+     * Generate JS files for specific ECMA version
      * Possible values: "v5"
      * Default value: "v5"
      */