Changelog: update for 1.2.6

CHANGELOG.en-US.md

 ## Changelog
 
+### 1.2.6
+
+*2017-03-28*
+
+- Fixed Switch compatible with SSR, #3752
+- Fixed the time of TimePicker calculating incorrectly, #3479
+- Fixed the week of DatePicker formatting incorrectly, #2774
+- Fixed the week of DatePicker initializing incorrectly, #3058
+- Fixed the events of Popover destroying incorrectly, #3555
+- Fixed InputNumber setInterval, #3514 (by @pengchongfu)
+- Fixed RadioButton css files, #3276
+- Fixed hover style on striped Table, #3696 (by @nicoeg)
+- Fixed Slider's button jumping left issue, #3664 (by @gabrielboliveira)
+- Added `delete-tag` event for Select, #3663 (by @pengchongfu)
+- Added `onPick` option for DatePicker, #2921
+- Added `status` for Step, #3722
+- Added full example for on-demand importing, #3302
+
 ### 1.2.5
 
 *2017-03-19*

CHANGELOG.zh-CN.md

 ## 更新日志
 
+### 1.2.6
+*2017-03-28*
+
+- 修复 Switch 样式不兼容 vue SSR，#3752
+- 修复 TimePicker 日期计算错误，#3479
+- 修复 DatePicker 格式化 week 类型错误，#2774
+- 修复 DatePicker 周选择器默认值，#3058
+- 修复 Popover 销毁时未正确清除事件，#3555
+- 修复 InputNumber 鼠标左右键一起按下会导致值一直自增加，#3514（by @pengchongfu）
+- 修复 RadioButton 样式文件引入但无样式，#3276
+- 修复 Table 的 hover 样式，#3696（by @nicoeg）
+- 修复 Slider 跳动问题，#3664（by @gabrielboliveira）
+- 新增 Select `delete-tag` 事件 #3663（by @pengchongfu）
+- 新增 DatePicker 的 `onPick` 选项，#2921
+- 新增 Steps 可分别设置 step 的状态（status）和样式调整，#3722
+- 新增完整的按需引入组件的文档，#3302
+
 ### 1.2.5
 *2017-03-19*