支持SSR、升级Vue版本和增加新的icon (#40)

* search component add new style

* update vue version and support ssr

* unit test

* add new icon

* new icon

docs/examples-docs/waterfall.md

@@ -105,7 +105,8 @@ export default {
   >
     <div
       class="waterfall-item"
-      v-for="item in list"
+      v-for="(item, index) in list"
+      :key="index"
       style="text-align: center;"
     >
       {{ item }}