[lua] update lua pairs/ipairs return signatures

std/lua/Lua.hx

@@ -63,9 +63,9 @@ extern class Lua {
 	**/
 	public static function tostring(v:Dynamic): String;
 
-	public static function ipairs<T>(t:Table<Int,T>): Void->T;
+	public static function ipairs<T>(t:Table<Int,T>): Dynamic->Int->T;
 
-	public static function pairs<A,B>(t:Table<A,B>): Void->A;
+	public static function pairs<A,B>(t:Table<A,B>): Dynamic->Dynamic->A;
 
 	public static function require(module:String) : Dynamic;