Changelog: update for 2.3.9 (#11230)

CHANGELOG.en-US.md

 ## Changelog
 
+### 2.3.9
+
+*2018-05-18*
+
+- Fixed when the source data does not have the field specified by a TableColumn's `prop` attribute, an error would occur when the mouse moves into that column's cells, #11137
+- The `lockScroll` attribute of pop up components no longer adds an inline style to the parent element, but instead adds a class name, #11114
+- Fixed the icon of Progress not displaying when its `status` is exception, #11172
+- Fixed options' `disabled` attribute not working in filterable Cascader's filter result list, #11185
+- Fixed an issue where Table's expanded row cannot be collapsed if the data source is updated after its expansion, #11186
+- `setCurrentKey` of Tree now accepts `null` as its param to cancel the currently highlighted node, #11205
+
 ### 2.3.8
 
 *2018-05-11*

CHANGELOG.es.md

 ## Changelog
 
+### 2.3.9
+
+*2018-05-18*
+
+- Fixed when the source data does not have the field specified by a TableColumn's `prop` attribute, an error would occur when the mouse moves into that column's cells, #11137
+- The `lockScroll` attribute of pop up components no longer adds an inline style to the parent element, but instead adds a class name, #11114
+- Fixed the icon of Progress not displaying when its `status` is exception, #11172
+- Fixed options' `disabled` attribute not working in filterable Cascader's filter result list, #11185
+- Fixed an issue where Table's expanded row cannot be collapsed if the data source is updated after its expansion, #11186
+- `setCurrentKey` of Tree now accepts `null` as its param to cancel the currently highlighted node, #11205
+
 ### 2.3.8
 
 *2018-05-11*

CHANGELOG.zh-CN.md

 ## 更新日志
 
+### 2.3.9
+
+*2018-05-18*
+
+- 修复当 TableColumn 的 `prop` 属性指定的字段在数据源中不存在时，鼠标移入该列单元格会报错的问题，#11137
+- 弹出类组件的 `lockScroll` 属性不再为父元素添加内联样式，而是添加相应类名，#11114
+- 修复 Progress 在 `status` 为 exception 时图标不显示的问题，#11172
+- 修复可搜索的 Cascader 在输入关键词后，选项的 `disabled` 属性失效的问题，#11185
+- 修复可展开的 Table 在展开某一行后更新数据源会造成该行无法收起的问题，#11186
+- Tree 的 `setCurrentKey` 方法支持传入 `null`，可取消当前高亮的节点，#11205
+
 ### 2.3.8
 
 *2018-05-11*