Merge branch 'master' into feature

* master:
  feat(table): support table border-radius define in theme
  add form-tutorial.md
  📝 Put gitter flags in badges in README (ant-design#13744)
  update deps of rc-select
  skip show-tooltip.md test when is dist test
  💄 update slider demo
  Fix a regular expression
  Improvements to badges in README (ant-design#13743)

README-zh_CN.md

@@ -12,14 +12,16 @@
 
 [![CircleCI branch](https://img.shields.io/circleci/project/github/ant-design/ant-design/master.svg?style=flat-square)](https://circleci.com/gh/ant-design/ant-design)
 [![Codecov](https://img.shields.io/codecov/c/github/ant-design/ant-design/master.svg?style=flat-square)](https://codecov.io/gh/ant-design/ant-design/branch/master)
-[![Dependencies](https://img.shields.io/david/ant-design/ant-design.svg)](https://david-dm.org/ant-design/ant-design)
-[![DevDependencies](https://img.shields.io/david/dev/ant-design/ant-design.svg)](https://david-dm.org/ant-design/ant-design?type=dev)
+[![Total alerts](https://img.shields.io/lgtm/alerts/g/ant-design/ant-design.svg?logo=lgtm&logoWidth=18&style=flat-square)](https://lgtm.com/projects/g/ant-design/ant-design/alerts/)
+[![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/ant-design/ant-design.svg?logo=lgtm&logoWidth=18&style=flat-square)](https://lgtm.com/projects/g/ant-design/ant-design/context:javascript)
+[![Dependencies](https://img.shields.io/david/ant-design/ant-design.svg?style=flat-square)](https://david-dm.org/ant-design/ant-design)
+[![DevDependencies](https://img.shields.io/david/dev/ant-design/ant-design.svg?style=flat-square)](https://david-dm.org/ant-design/ant-design?type=dev)
 
 [![npm package](https://img.shields.io/npm/v/antd.svg?style=flat-square)](https://www.npmjs.org/package/antd)
 [![NPM downloads](http://img.shields.io/npm/dm/antd.svg?style=flat-square)](http://npmjs.com/antd)
 [![Percentage of issues still open](http://isitmaintained.com/badge/open/ant-design/ant-design.svg)](http://isitmaintained.com/project/ant-design/ant-design "Percentage of issues still open")
-[![Gitter](https://badges.gitter.im/ant-design/ant-design-english.svg)](https://gitter.im/ant-design/ant-design-english?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)(🇺🇸)
-[![Join the chat at https://gitter.im/ant-design/ant-design](https://img.shields.io/gitter/room/ant-design/ant-design.svg?style=flat-square)](https://gitter.im/ant-design/ant-design?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)(🇨🇳)
+[![Gitter](https://img.shields.io/gitter/room/ant-design/ant-design-english.svg?style=flat-square&logoWidth=20&logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%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%2BDQo8ZyBpZD0iczE4Ij4NCjxnIGlkPSJzOSI%2BDQo8ZyBpZD0iczUiPg0KPGcgaWQ9InM0Ij4NCjxwYXRoIGlkPSJzIiBkPSJNMjQ3LDkwIDMxNy41MzQyMzAsMzA3LjA4MjAzOSAxMzIuODczMjE4LDE3Mi45MTc5NjFIMzYxLjEyNjc4MkwxNzYuNDY1NzcwLDMwNy4wODIwMzl6Ii8%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzIiB5PSI0MjAiLz4NCjx1c2UgeGxpbms6aHJlZj0iI3MiIHk9Ijg0MCIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgeT0iMTI2MCIvPg0KPC9nPg0KPHVzZSB4bGluazpocmVmPSIjcyIgeT0iMTY4MCIvPg0KPC9nPg0KPHVzZSB4bGluazpocmVmPSIjczQiIHg9IjI0NyIgeT0iMjEwIi8%2BDQo8L2c%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzOSIgeD0iNDk0Ii8%2BDQo8L2c%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzMTgiIHg9Ijk4OCIvPg0KPHVzZSB4bGluazpocmVmPSIjczkiIHg9IjE5NzYiLz4NCjx1c2UgeGxpbms6aHJlZj0iI3M1IiB4PSIyNDcwIi8%2BDQo8L2c%2BDQo8L3N2Zz4%3D)](https://gitter.im/ant-design/ant-design-english?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[![Join the chat at https://gitter.im/ant-design/ant-design](https://img.shields.io/gitter/room/ant-design/ant-design.svg?style=flat-square&logoWidth=20&logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%2CPD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4NCjxzdmcgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayIgd2lkdGg9IjkwMCIgaGVpZ2h0PSI2MDAiIHZpZXdCb3g9IjAgMCAzMCAyMCI%2BDQo8ZGVmcz4NCjxwYXRoIGlkPSJzIiBkPSJNMCwtMSAwLjU4Nzc4NSwwLjgwOTAxNyAtMC45NTEwNTcsLTAuMzA5MDE3SDAuOTUxMDU3TC0wLjU4Nzc4NSwwLjgwOTAxN3oiIGZpbGw9IiNmZmRlMDAiLz4NCjwvZGVmcz4NCjxyZWN0IHdpZHRoPSIzMCIgaGVpZ2h0PSIyMCIgZmlsbD0iI2RlMjkxMCIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoNSw1KSBzY2FsZSgzKSIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoMTAsMikgcm90YXRlKDIzLjAzNjI0MykiLz4NCjx1c2UgeGxpbms6aHJlZj0iI3MiIHRyYW5zZm9ybT0idHJhbnNsYXRlKDEyLDQpIHJvdGF0ZSg0NS44Njk4OTgpIi8%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzIiB0cmFuc2Zvcm09InRyYW5zbGF0ZSgxMiw3KSByb3RhdGUoNjkuOTQ1Mzk2KSIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoMTAsOSkgcm90YXRlKDIwLjY1OTgwOCkiLz4NCjwvc3ZnPg%3D%3D)](https://gitter.im/ant-design/ant-design?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 </div>
 

README.md

@@ -12,14 +12,16 @@ An enterprise-class UI design language and React-based implementation.
 
 [![CircleCI branch](https://img.shields.io/circleci/project/github/ant-design/ant-design/master.svg?style=flat-square)](https://circleci.com/gh/ant-design/ant-design)
 [![Codecov](https://img.shields.io/codecov/c/github/ant-design/ant-design/master.svg?style=flat-square)](https://codecov.io/gh/ant-design/ant-design/branch/master)
-[![Dependencies](https://img.shields.io/david/ant-design/ant-design.svg)](https://david-dm.org/ant-design/ant-design)
-[![DevDependencies](https://img.shields.io/david/dev/ant-design/ant-design.svg)](https://david-dm.org/ant-design/ant-design?type=dev)
+[![Total alerts](https://img.shields.io/lgtm/alerts/g/ant-design/ant-design.svg?logo=lgtm&logoWidth=18&style=flat-square)](https://lgtm.com/projects/g/ant-design/ant-design/alerts/)
+[![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/ant-design/ant-design.svg?logo=lgtm&logoWidth=18&style=flat-square)](https://lgtm.com/projects/g/ant-design/ant-design/context:javascript)
+[![Dependencies](https://img.shields.io/david/ant-design/ant-design.svg?style=flat-square)](https://david-dm.org/ant-design/ant-design)
+[![DevDependencies](https://img.shields.io/david/dev/ant-design/ant-design.svg?style=flat-square)](https://david-dm.org/ant-design/ant-design?type=dev)
 
 [![npm package](https://img.shields.io/npm/v/antd.svg?style=flat-square)](https://www.npmjs.org/package/antd)
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+[![Gitter](https://img.shields.io/gitter/room/ant-design/ant-design-english.svg?style=flat-square&logoWidth=20&logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%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%2BDQo8ZyBpZD0iczE4Ij4NCjxnIGlkPSJzOSI%2BDQo8ZyBpZD0iczUiPg0KPGcgaWQ9InM0Ij4NCjxwYXRoIGlkPSJzIiBkPSJNMjQ3LDkwIDMxNy41MzQyMzAsMzA3LjA4MjAzOSAxMzIuODczMjE4LDE3Mi45MTc5NjFIMzYxLjEyNjc4MkwxNzYuNDY1NzcwLDMwNy4wODIwMzl6Ii8%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzIiB5PSI0MjAiLz4NCjx1c2UgeGxpbms6aHJlZj0iI3MiIHk9Ijg0MCIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgeT0iMTI2MCIvPg0KPC9nPg0KPHVzZSB4bGluazpocmVmPSIjcyIgeT0iMTY4MCIvPg0KPC9nPg0KPHVzZSB4bGluazpocmVmPSIjczQiIHg9IjI0NyIgeT0iMjEwIi8%2BDQo8L2c%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzOSIgeD0iNDk0Ii8%2BDQo8L2c%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzMTgiIHg9Ijk4OCIvPg0KPHVzZSB4bGluazpocmVmPSIjczkiIHg9IjE5NzYiLz4NCjx1c2UgeGxpbms6aHJlZj0iI3M1IiB4PSIyNDcwIi8%2BDQo8L2c%2BDQo8L3N2Zz4%3D)](https://gitter.im/ant-design/ant-design-english?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[![Join the chat at https://gitter.im/ant-design/ant-design](https://img.shields.io/gitter/room/ant-design/ant-design.svg?style=flat-square&logoWidth=20&logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%2CPD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4NCjxzdmcgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayIgd2lkdGg9IjkwMCIgaGVpZ2h0PSI2MDAiIHZpZXdCb3g9IjAgMCAzMCAyMCI%2BDQo8ZGVmcz4NCjxwYXRoIGlkPSJzIiBkPSJNMCwtMSAwLjU4Nzc4NSwwLjgwOTAxNyAtMC45NTEwNTcsLTAuMzA5MDE3SDAuOTUxMDU3TC0wLjU4Nzc4NSwwLjgwOTAxN3oiIGZpbGw9IiNmZmRlMDAiLz4NCjwvZGVmcz4NCjxyZWN0IHdpZHRoPSIzMCIgaGVpZ2h0PSIyMCIgZmlsbD0iI2RlMjkxMCIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoNSw1KSBzY2FsZSgzKSIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoMTAsMikgcm90YXRlKDIzLjAzNjI0MykiLz4NCjx1c2UgeGxpbms6aHJlZj0iI3MiIHRyYW5zZm9ybT0idHJhbnNsYXRlKDEyLDQpIHJvdGF0ZSg0NS44Njk4OTgpIi8%2BDQo8dXNlIHhsaW5rOmhyZWY9IiNzIiB0cmFuc2Zvcm09InRyYW5zbGF0ZSgxMiw3KSByb3RhdGUoNjkuOTQ1Mzk2KSIvPg0KPHVzZSB4bGluazpocmVmPSIjcyIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoMTAsOSkgcm90YXRlKDIwLjY1OTgwOCkiLz4NCjwvc3ZnPg%3D%3D)](https://gitter.im/ant-design/ant-design?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
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