Changelog: update for 1.4.4

CHANGELOG.en-US.md

 ## Changelog
 
+### 1.4.4
+
+*2017-09-05*
+
+- Fixed all months disabled in DatePicker month view when `disabledDate` is set, #6768 @qingdengyue
+- Added `debounce` attribute for Slider, #6820 @langgo
+- Fixed value of Pagination jumper can be bigger than the total page count, #6842 @huguangju
+- Fixed TimePicker's focus slipping away when selecting hour to 23 with mouse scroll, #6719 @qingdengyue
+
 ### 1.4.3
 
 *2017-08-25*

CHANGELOG.zh-CN.md

 ## 更新日志
 
+### 1.4.4
+*2017-09-05*
+
+- 修复设置了 `disabledDate` 的 DatePicker 在月视图下全部不可选的问题，#6768 @qingdengyue
+- Slider 新增 `debounce` 属性，#6820 @langgo
+- 修复 Pagination 的 jumper 中可以输入比最大页数更大的数字的问题，#6842 @huguangju
+- 修复 TimePicker 的小时数难以通过滚动的方式选中 23 时的问题，#6719 @qingdengyue
+
 ### 1.4.3
 *2017-08-25*