docs: add kentcdodds as a contributor (#130)

Author: allcontributors[bot]

.all-contributorsrc

@@ -192,6 +192,15 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "kentcdodds",
+      "name": "Kent C. Dodds",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1500684?v=4",
+      "profile": "https://kentcdodds.com",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -23,7 +23,7 @@
 [![Tweet][tweet-badge]][tweet-url]
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-17-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-18-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 ## Installation
@@ -198,6 +198,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="http://tdeekens.name"><img src="https://avatars3.githubusercontent.com/u/1877073?v=4" width="100px;" alt=""/><br /><sub><b>Tobias Deekens</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/issues?q=author%3Atdeekens" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://github.com/victorandcode"><img src="https://avatars0.githubusercontent.com/u/18427801?v=4" width="100px;" alt=""/><br /><sub><b>Victor Cordova</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=victorandcode" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=victorandcode" title="Tests">⚠️</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/issues?q=author%3Avictorandcode" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://github.com/dmitry-lobanov"><img src="https://avatars0.githubusercontent.com/u/7376755?v=4" width="100px;" alt=""/><br /><sub><b>Dmitry Lobanov</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=dmitry-lobanov" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=dmitry-lobanov" title="Tests">⚠️</a></td>
+    <td align="center"><a href="https://kentcdodds.com"><img src="https://avatars0.githubusercontent.com/u/1500684?v=4" width="100px;" alt=""/><br /><sub><b>Kent C. Dodds</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/issues?q=author%3Akentcdodds" title="Bug reports">🐛</a></td>
   </tr>
 </table>