kakao cdn에 async 속성 추가

mobile/skin/shop/basic/main.20.skin.php

@@ -10,7 +10,7 @@ add_javascript('<script src="'.G5_JS_URL.'/shop.list.action.js"></script>', 10);
 
 <script src="<?php echo G5_JS_URL ?>/jquery.fancylist.js"></script>
 <?php if($config['cf_kakao_js_apikey']) { ?>
-<script src="https://developers.kakao.com/sdk/js/kakao.min.js"></script>
+<script src="https://developers.kakao.com/sdk/js/kakao.min.js" async></script>
 <script src="<?php echo G5_JS_URL; ?>/kakaolink.js"></script>
 <script>
     // 사용할 앱의 Javascript 키를 설정해 주세요.