docs: add sakthivel as a contributor (#2659)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -1365,6 +1365,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "sakthivel",
+      "name": "Sakthivel Sengodan Sapient",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/205201?v=4",
+      "profile": "https://github.com/Sakthivel",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "repoType": "github",

README.md

@@ -1,4 +1,4 @@
-# [CodeSandbox](https://codesandbox.io) [![Join the community on Spectrum](https://withspectrum.github.io/badge/badge.svg)](https://spectrum.chat/codesandbox) [![All Contributors](https://img.shields.io/badge/all_contributors-145-orange.svg?style=flat-square)](#contributors) [![CircleCI](https://circleci.com/gh/codesandbox/codesandbox-client.svg?style=svg)](https://circleci.com/gh/codesandbox/codesandbox-client) [![BrowserStack Status](https://www.browserstack.com/automate/badge.svg?badge_key=cVJuczlJWUtqWXhIbFN1ZjVQekF4NzNsd3phNEZRaGlWU0pHYVVkdGRFWT0tLXFtTVhaOWRySmN0ZG5QVDNDQ0g5Z0E9PQ==--79fe3eae4f149a400d396c9b12d3988f685785cf)](https://www.browserstack.com/automate/public-build/cVJuczlJWUtqWXhIbFN1ZjVQekF4NzNsd3phNEZRaGlWU0pHYVVkdGRFWT0tLXFtTVhaOWRySmN0ZG5QVDNDQ0g5Z0E9PQ==--79fe3eae4f149a400d396c9b12d3988f685785cf) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com) [![first-timers-only Friendly](https://img.shields.io/badge/first--timers--only-friendly-blue.svg)](http://www.firsttimersonly.com/) [![lerna](https://img.shields.io/badge/maintained%20with-lerna-cc00ff.svg)](https://lerna.js.org/)
+# [CodeSandbox](https://codesandbox.io) [![Join the community on Spectrum](https://withspectrum.github.io/badge/badge.svg)](https://spectrum.chat/codesandbox) [![All Contributors](https://img.shields.io/badge/all_contributors-146-orange.svg?style=flat-square)](#contributors) [![CircleCI](https://circleci.com/gh/codesandbox/codesandbox-client.svg?style=svg)](https://circleci.com/gh/codesandbox/codesandbox-client) [![BrowserStack Status](https://www.browserstack.com/automate/badge.svg?badge_key=cVJuczlJWUtqWXhIbFN1ZjVQekF4NzNsd3phNEZRaGlWU0pHYVVkdGRFWT0tLXFtTVhaOWRySmN0ZG5QVDNDQ0g5Z0E9PQ==--79fe3eae4f149a400d396c9b12d3988f685785cf)](https://www.browserstack.com/automate/public-build/cVJuczlJWUtqWXhIbFN1ZjVQekF4NzNsd3phNEZRaGlWU0pHYVVkdGRFWT0tLXFtTVhaOWRySmN0ZG5QVDNDQ0g5Z0E9PQ==--79fe3eae4f149a400d396c9b12d3988f685785cf) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com) [![first-timers-only Friendly](https://img.shields.io/badge/first--timers--only-friendly-blue.svg)](http://www.firsttimersonly.com/) [![lerna](https://img.shields.io/badge/maintained%20with-lerna-cc00ff.svg)](https://lerna.js.org/)
 
 [![Backers on Open Collective](https://opencollective.com/codesandbox/backers/badge.svg)](#backers)
 [![Sponsors on Open Collective](https://opencollective.com/codesandbox/sponsors/badge.svg)](#sponsors)
@@ -229,6 +229,7 @@ Thanks goes to these wonderful people
     <td align="center"><a href="http://yeisondaza.com"><img src="https://avatars0.githubusercontent.com/u/9127504?v=4" width="100px;" alt="Yeison Daza"/><br /><sub><b>Yeison Daza</b></sub></a><br /><a href="https://github.com/codesandbox/codesandbox-client/commits?author=yeion7" title="Code">💻</a></td>
     <td align="center"><a href="https://shriram-balaji.github.io"><img src="https://avatars1.githubusercontent.com/u/11358903?v=4" width="100px;" alt="Shriram Balaji"/><br /><sub><b>Shriram Balaji</b></sub></a><br /><a href="https://github.com/codesandbox/codesandbox-client/commits?author=Shriram-Balaji" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/chinmay17"><img src="https://avatars2.githubusercontent.com/u/7131231?v=4" width="100px;" alt="Chinmay Chaudhary"/><br /><sub><b>Chinmay Chaudhary</b></sub></a><br /><a href="https://github.com/codesandbox/codesandbox-client/commits?author=chinmay17" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/Sakthivel"><img src="https://avatars3.githubusercontent.com/u/205201?v=4" width="100px;" alt="Sakthivel Sengodan Sapient"/><br /><sub><b>Sakthivel Sengodan Sapient</b></sub></a><br /><a href="https://github.com/codesandbox/codesandbox-client/commits?author=sakthivel" title="Code">💻</a></td>
   </tr>
 </table>