[Improvement] Sku: optimize DOM (#704)

packages/loading/index.vue

@@ -10,11 +10,9 @@
 </template>
 
 <script>
-import install from '../utils/install';
-
-export default {
-  install,
+import create from '../utils/create-basic';
 
+export default create({
   name: 'loading',
 
   props: {
@@ -37,5 +35,5 @@ export default {
       } : {};
     }
   }
-};
+});
 </script>