[+] update changelog

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Change Log
 
+## 0.4.0
+
+* [+] Stronger about [wxc-city](https://github.com/alibaba/weex-ui/blob/master/packages/wxc-city/README.md)，it's easier to use, no need to configure a lot of parameters.
+* [!] Optimization of GitHub Readme.
+* [+] Add a Chinese version of [Changelog](https://github.com/alibaba/weex-ui/blob/master/CHANGELOG_cn.md)
+* [+] Add more FQA.
+* [+] Merge pull request from committer.
+
 ## 0.3.13
 
 * [!] Fix the `slot` bug about [`wxc-tab-bar`](https://github.com/alibaba/weex-ui/blob/master/packages/wxc-tab-bar/README.md).

CHANGELOG_cn.md

@@ -1,5 +1,13 @@
 # 升级日志
 
+## 0.4.0
+
+* [+] 更强大的 [wxc-city](https://github.com/alibaba/weex-ui/blob/master/packages/wxc-city/README.md)组件，使用简单化，默认城市配置，不需传入很多参数，**但是涉及参数变动**
+* [!] 优化 Github 中 Readme 中英文档的显示
+* [+] 新增一个中文版本的 [Changelog](https://github.com/alibaba/weex-ui/blob/master/CHANGELOG_cn.md)
+* [+] 从群里收集，新增更多的常见问题
+* [+] 合并外部贡献者的代码提交
+
 ## 0.3.13
 
 * [!] 修复 [`wxc-tab-bar`](https://github.com/alibaba/weex-ui/blob/master/packages/wxc-tab-bar/README.md) slot bug

docs/_coverpage.md

@@ -1,6 +1,6 @@
 <img src="https://img.alicdn.com/tfs/TB1kCs_er_I8KJjy1XaXXbsxpXa-419-495.png" width="146px">
 
-# <span style="font-weight:400;">Weex Ui</span> <span style="font-size:14px">0.3.13</span>
+# <span style="font-weight:400;">Weex Ui</span> <span style="font-size:14px">0.4.0</span>
 
 > <span style="line-height:1.8rem;font-weight:400;font-size:1.3rem">A rich interaction, lightweight, high performance UI library.<span>