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/swipe.md

@@ -77,7 +77,7 @@ export default {
 :::demo 基础用法
 ```html
 <van-swipe>
-  <van-swipe-item v-for="img in images">
+  <van-swipe-item v-for="(img, index) in images" :key="index">
     <a href="https://youzan.com" target="_blank">
       <img v-lazy="img" alt="">
     </a>
@@ -106,7 +106,7 @@ export default {
 :::demo 自动轮播
 ```html
 <van-swipe auto-play @pagechange:end="handlePageEnd">
-  <van-swipe-item v-for="img in autoImages">
+  <van-swipe-item v-for="(img, index) in autoImages" :key="index">
     <img v-lazy="img" alt="">
   </van-swipe-item>
 </van-swipe>