update changelog for 2.0

CHANGELOG.en-US.md

@@ -21,6 +21,7 @@ If you want to read change logs before `2.0.0`, please visit [GitHub](https://gi
 - Improve style of Modal.
 - Improve animation of Tooltip.
 - Improve style of Transfer's buttons.
+- Fix some less variables.
 - Fix errors while render Affix and BackTop on server. [#3283](https://github.com/ant-design/ant-design/issues/3283) [#3343](https://github.com/ant-design/ant-design/issues/3343)
 - Fix conflicts between Cascader search mode and browser's autocomplete behaviour. [#3350](https://github.com/ant-design/ant-design/issues/3350)
 - Fix bug that `h3` cannot be the value of Card[title]. [#3388](https://github.com/ant-design/ant-design/issues/3388)
@@ -30,7 +31,7 @@ If you want to read change logs before `2.0.0`, please visit [GitHub](https://gi
   - Fix style conflicts with TimePicker. [#3312](https://github.com/ant-design/ant-design/issues/3312) [#3307](https://github.com/ant-design/ant-design/issues/3307)
 - Fix overflow issue for Form.Item label.
 - Fix infinite loop while inc/dec InputNubmer with keyboard. [#3239](https://github.com/ant-design/ant-design/issues/3239)
-- Fix bug that Popconfirm[arrowPointAtCenter] doesn't work.
+- Fix bug Popover and Popconfirm `arrowPointAtCenter` doesn't work.
 - Select
   - Fix bug that styles of Select are imported twice.
   - Fix bug `notFoundContent` cannot be set as `''`. [#3345](https://github.com/ant-design/ant-design/issues/3345)

CHANGELOG.zh-CN.md

@@ -21,8 +21,9 @@ timeline: true
 - 优化 Modal 样式细节。
 - 优化 Tooltip 动画。
 - 优化 Transfer 按钮的样式。
+- 整理和修复了部分 less 变量。
 - 修复 Affix 与 BackTop 的服务端渲染问题。[#3283](https://github.com/ant-design/ant-design/issues/3283) [#3343](https://github.com/ant-design/ant-design/issues/3343)
-- 修复 Card[title] 内无法使用 `h3` 之类的标签的问题。[#3388](https://github.com/ant-design/ant-design/issues/3388) 
+- 修复 Card[title] 内无法使用 `h3` 之类的标签的问题。[#3388](https://github.com/ant-design/ant-design/issues/3388)
 - 修复 Cascader 搜索模式与浏览器自动完成有冲突的问题。[#3350](https://github.com/ant-design/ant-design/issues/3350)
 - DatePicker
   - 修复设置 `showTime` 后，`onChange` 重复触发的问题。[#3376](https://github.com/ant-design/ant-design/issues/3376)
@@ -30,7 +31,7 @@ timeline: true
   - 修复与 TimePicker 样式冲突问题。[#3312](https://github.com/ant-design/ant-design/issues/3312) [#3307](https://github.com/ant-design/ant-design/issues/3307)
 - 修复 Form.Item 标签文案过长溢出的问题。
 - 修复 InputNubmer 键盘事件死循环问题。[#3239](https://github.com/ant-design/ant-design/issues/3239)
-- 修复 Popconfirm[arrowPointAtCenter] 无效的问题。
+- 修复 Popover 和 Popconfirm 的 `arrowPointAtCenter` 无效的问题。
 - Select
   - 修复样式重复引入的问题。
   - 修复 `notFoundContent` 无法置空的问题。[#3345](https://github.com/ant-design/ant-design/issues/3345)