Add 3.1.2 changelog (#8958)

[ci skip]

CHANGELOG.en-US.md

@@ -15,6 +15,21 @@ timeline: true
 
 ---
 
+## 3.1.2
+
+`2018-01-13`
+
+- 🐞 Fix Button can not display `0`. [#8733](https://github.com/ant-design/ant-design/pull/8733) [@Cuihongsen](https://github.com/Cuihongsen)
+- 🐞 Fix extra scrollbar in Table and List caused by Spin. [#8799](https://github.com/ant-design/ant-design/issues/8799)
+- 🐞 Fix can not pass function to Table[emptyText]. [#8871](https://github.com/ant-design/ant-design/issues/8871)
+- 🐞 Fix now working Dropdown[transitionName].
+- 🐞 Fix issue resulting in font changes when enter number in Input.[#8636](https://github.com/ant-design/ant-design/issues/8636)
+- 🐞 Fix issue resulting in wrong locale text when import multiple locale files. [#8785](https://github.com/ant-design/ant-design/pull/8785)
+- 🐞 Fix `locales` in dist/antd-with-locales.js has a `extra` default key. [#8881](https://github.com/ant-design/ant-design/issues/8881)
+- 🐞 Fix some TypeScript type definitions. [4cc29bc](https://github.com/ant-design/ant-design/commit/4cc29bc11cf7c019c63a25693adff3dbb58b41c3) [693e734](https://github.com/ant-design/ant-design/commit/693e734a82b5e1faf25b025127afca67e75f9c88) [67e956d](https://github.com/ant-design/ant-design/commit/67e956dddd040f63b2a59b8b619123bbb0065780) [ecd4177](https://github.com/ant-design/ant-design/commit/ecd4177638da1eac3a3750fe5ad68b9309865542) [33119ec](https://github.com/ant-design/ant-design/commit/33119ec535e7b819541d4753464871988b37dd6f) [88e0c9b](https://github.com/ant-design/ant-design/commit/88e0c9b436f196def62e737ea72e105aba4b5d4e)
+- 🌟 Add some new less variables [b9b5aba](https://github.com/ant-design/ant-design/commit/b9b5abab3364bf752e9644415088b142a153e385) [5931b20](https://github.com/ant-design/ant-design/commit/5931b201da58e993227a04128045e627f2b65c46) [c9d7397](https://github.com/ant-design/ant-design/commit/c9d73978dd2694f9d2bd0111f82a20d237f83621)
+- 🌟 Optimize Chinese quotes displaying.
+
 ## 3.1.1
 
 `2018-01-08`

CHANGELOG.zh-CN.md

@@ -15,6 +15,21 @@ timeline: true
 
 ---
 
+## 3.1.2
+
+`2018-01-13`
+
+- 🐞 修复 Button 不能正确显示 `0` 的问题。[#8733](https://github.com/ant-design/ant-design/pull/8733) [@Cuihongsen](https://github.com/Cuihongsen)
+- 🐞 修复 Table 和 List 中由于 Spin 导致的滚动条。[#8799](https://github.com/ant-design/ant-design/issues/8799)
+- 🐞 修复不能传方法给 Table[emptyText] 的问题。[#8871](https://github.com/ant-design/ant-design/issues/8871)
+- 🐞 修复 Dropdown[transitionName] 不生效的问题。
+- 🐞 修复 Input 中输入数字时字体会发生变化的问题。 [#8636](https://github.com/ant-design/ant-design/issues/8636)
+- 🐞 修复 import 多个 locale 文件后日期文本显示错误的问题。[#8785](https://github.com/ant-design/ant-design/pull/8785)
+- 🐞 修复 dist/antd-with-locales.js 中的 locale 会多一个 default 字段的问题。[#8881](https://github.com/ant-design/ant-design/issues/8881)
+- 🐞 修复 TypeScript 定义 [4cc29bc](https://github.com/ant-design/ant-design/commit/4cc29bc11cf7c019c63a25693adff3dbb58b41c3) [693e734](https://github.com/ant-design/ant-design/commit/693e734a82b5e1faf25b025127afca67e75f9c88) [67e956d](https://github.com/ant-design/ant-design/commit/67e956dddd040f63b2a59b8b619123bbb0065780) [ecd4177](https://github.com/ant-design/ant-design/commit/ecd4177638da1eac3a3750fe5ad68b9309865542) [33119ec](https://github.com/ant-design/ant-design/commit/33119ec535e7b819541d4753464871988b37dd6f) [88e0c9b](https://github.com/ant-design/ant-design/commit/88e0c9b436f196def62e737ea72e105aba4b5d4e)
+- 🌟 新增 less 变量 [b9b5aba](https://github.com/ant-design/ant-design/commit/b9b5abab3364bf752e9644415088b142a153e385) [5931b20](https://github.com/ant-design/ant-design/commit/5931b201da58e993227a04128045e627f2b65c46) [c9d7397](https://github.com/ant-design/ant-design/commit/c9d73978dd2694f9d2bd0111f82a20d237f83621)
+- 🌟 优化中文引号的显示。
+
 ## 3.1.1
 
 `2018-01-08`