docs: add jmcriffey as a contributor (#147) [skip ci]

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -213,6 +213,15 @@
         "test",
         "doc"
       ]
+    },
+    {
+      "login": "jmcriffey",
+      "name": "Jeff Rifwald",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/2831294?v=4",
+      "profile": "https://github.com/jmcriffey",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -23,9 +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-19-orange.svg?style=flat-square)](#contributors-)
-
+[![All Contributors](https://img.shields.io/badge/all_contributors-20-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 ## Installation
@@ -201,12 +199,12 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <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>
     <td align="center"><a href="https://github.com/gndelia"><img src="https://avatars1.githubusercontent.com/u/352474?v=4" width="100px;" alt=""/><br /><sub><b>Gonzalo D'Elia</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=gndelia" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=gndelia" title="Tests">⚠️</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=gndelia" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/jmcriffey"><img src="https://avatars0.githubusercontent.com/u/2831294?v=4" width="100px;" alt=""/><br /><sub><b>Jeff Rifwald</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=jmcriffey" title="Documentation">📖</a></td>
   </tr>
 </table>
 
 <!-- markdownlint-enable -->
 <!-- prettier-ignore-end -->
-
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!