update CHANGLOG.md

CHANGELOG.md

+## 2.0.5
+
+`2019-3-18`
+
+* :sparkles: `Dialog`组件新增支持标签形式用法
+* :bug: 修复`DatePicker`组件按需加载scss文件样式丢失的问题
+* :zap: 官网布局优化
+* :zap: 文档内容完善
+
 ## 2.0.4
 
 `2019-3-12`

package.json

 {
   "name": "@nutui/nutui",
-  "version": "2.0.4",
+  "version": "2.0.5",
   "description": "一套轻量级移动端Vue组件库",
   "typings": "dist/types/index.d.ts",
   "main": "dist/nutui.js",