Changelog: update for 1.4.0

CHANGELOG.en-US.md

@@ -1,5 +1,66 @@
 ## Changelog
 
+### 1.4.0 Boron
+
+*2017-07-21*
+
+#### New features:
+- Message
+  - `message` attribute now supports VNode, #5463 (by @egyptik)
+- ColorPicker
+  - Added `active-change` event, #5775
+- Popover
+  - Added `open-delay` attribute, #5842 (by @kaungmyatlwin)
+- Table
+  - A third parameter `value` is passed to `formatter`, #5709 (by @haledeng)
+- Tree
+  - Added `disabled` attribute, #5937
+- Menu
+  - Added `collaspe` attribute, #5941
+- Select
+  - Added `value-key` attribute, #5897
+
+#### Fixes:
+- DatePicker
+  - i18n failure for some texts, #5485
+  - returning a non-zero millisecond value when initial value is empty, #5663
+  - `disabledDate` affecting undesired date, #4946 (by @liyangworld)
+- Steps
+  - style problems when a step is dynamically added or removed, #5456 (by @elfman)
+- Table
+  - highlight row misplaced when an expandable Table has fixed table columns, #5471 (by @elfman)
+  - `classList` not supported in some browsers, #5613 (by @flynntsc)
+- Select
+  - single Select unable to scroll to the selected item when the dropdown menu pops up, #5564（by @wacky6）
+- Radio
+  - border radius lost in RadioGroups with only one Radio, #5646 (by @YYvanYang)
+- Upload
+  - unable to reselect previously deleted file when `auto-upload` is false, #5706
+  - delete button still visible and functioning when `disabled`, #5841
+  - compatibility issue with Vue 2.4 `key`, #5872
+- MessageBox
+  - clicking cancel buttons getting resolved when not invoked as a `confirm` or `prompt`, #5658
+- Rate
+  - active icons not reflecting decimal part of initial value, #5785
+- Pagination
+  - compatibility issue of total page display with vue-i18n@6.x, #5796 (by @mario56)
+  - apostrophe incorrectly showing up when current page is one page less than total page, #5861 (by @openks)
+- Loading
+  - style problems when bound to invisible elements, #5649 (by @xiongzixiao)
+- Cascader
+  - text in the input box not vertically aligned, #5819 (by @jianzhi92)
+- Tree
+  - `setCheckedKeys` and `setCheckedNodes` in lazy mode, #5937
+  - loading all descendent nodes when a parent node is checked in lazy mode, #5963
+- Form
+  - label named slot not working when `label` is not assigned on FormItem, #5921
+- Tooltip
+  - not working in Vue 2.4.x when the triggering element is a custom component, #5916
+
+#### Breaking changes:
+- Select
+  - when value is an object, `value-key` is required as its unique identity key, #5897
+
 ### 1.3.7
 
 *2017-06-18*