update

src/components/dropdown/dropdown-menu.vue

@@ -2,5 +2,7 @@
     <ul class="ivu-dropdown-menu"><slot></slot></ul>
 </template>
 <script>
-    export default {};
+    export default {
+        name: 'DropdownMenu'
+    };
 </script>

src/components/select/index.js

@@ -2,4 +2,6 @@ import Select from './select.vue';
 import Option from './option.vue';
 import OptionGroup from './option-group.vue';
 
-export { Select, Option, OptionGroup };
+export { Select, Option, OptionGroup };
+
+export default Select;