docs: add AntonNiklasson as a contributor (#103)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -120,6 +120,17 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "AntonNiklasson",
+      "name": "Anton Niklasson",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/785676?v=4",
+      "profile": "http://www.antn.se",
+      "contributions": [
+        "code",
+        "test",
+        "doc"
+      ]
     }
   ]
 }

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-11-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-12-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 [![PRs Welcome][prs-badge]][prs]
 [![Code of Conduct][coc-badge]][coc]
@@ -154,6 +154,7 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://github.com/atsikov"><img src="https://avatars3.githubusercontent.com/u/1422928?v=4" width="100px;" alt=""/><br /><sub><b>Aleksei Tsikov</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/issues?q=author%3Aatsikov" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://mario.dev"><img src="https://avatars1.githubusercontent.com/u/2677072?v=4" width="100px;" alt=""/><br /><sub><b>Mario Beltrán Alarcón</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=Belco90" title="Documentation">📖</a></td>
     <td align="center"><a href="https://codepen.io/ariperkkio/"><img src="https://avatars2.githubusercontent.com/u/14806298?v=4" width="100px;" alt=""/><br /><sub><b>Ari Perkkiö</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/issues?q=author%3AAriPerkkio" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="http://www.antn.se"><img src="https://avatars0.githubusercontent.com/u/785676?v=4" width="100px;" alt=""/><br /><sub><b>Anton Niklasson</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=AntonNiklasson" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=AntonNiklasson" title="Tests">⚠️</a> <a href="https://github.com/testing-library/eslint-plugin-jest-dom/commits?author=AntonNiklasson" title="Documentation">📖</a></td>
   </tr>
 </table>