docs: add RIP21 as a contributor (#67)

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -74,6 +74,15 @@
         "doc",
         "bug"
       ]
+    },
+    {
+      "login": "RIP21",
+      "name": "Andrey Los",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/3940079?v=4",
+      "profile": "http://ololos.space/",
+      "contributions": [
+        "bug"
+      ]
     }
   ]
 }

README.md

@@ -14,7 +14,7 @@
 [![MIT License][license-badge]][license]
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-6-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-7-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 [![PRs Welcome][prs-badge]][prs]
 [![Code of Conduct][coc-badge]][coc]
@@ -146,12 +146,12 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://chriscolborne.com"><img src="https://avatars2.githubusercontent.com/u/101371?v=4" width="100px;" alt=""/><br /><sub><b>Chris Colborne</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=zorfling" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=zorfling" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://michaeldeboey.be"><img src="https://avatars3.githubusercontent.com/u/6643991?v=4" width="100px;" alt=""/><br /><sub><b>Michaël De Boey</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=MichaelDeBoey" title="Code">💻</a></td>
     <td align="center"><a href="http://gerritalex.de"><img src="https://avatars1.githubusercontent.com/u/29307652?v=4" width="100px;" alt=""/><br /><sub><b>Gerrit Alex</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=ljosberinn" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=ljosberinn" title="Tests">⚠️</a> <a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=ljosberinn" title="Documentation">📖</a> <a href="https://github.com/testing-library/eslint-plugin-jest-dom/issues?q=author%3Aljosberinn" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="http://ololos.space/"><img src="https://avatars1.githubusercontent.com/u/3940079?v=4" width="100px;" alt=""/><br /><sub><b>Andrey Los</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/issues?q=author%3ARIP21" title="Bug reports">🐛</a></td>
   </tr>
 </table>
 
 <!-- markdownlint-enable -->
 <!-- prettier-ignore-end -->
-
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors][all-contributors] specification.