docs: add geoffrich as a contributor (#301)

* docs: update README.md
* docs: update .all-contributorsrc

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -541,6 +541,18 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "geoffrich",
+      "name": "Geoff Rich",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/4992896?v=4",
+      "profile": "https://github.com/geoffrich",
+      "contributions": [
+        "code",
+        "test",
+        "ideas",
+        "bug"
+      ]
     }
   ],
   "repoHost": "https://github.com",

README.md

@@ -1149,6 +1149,7 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://twitter.com/boriscoder"><img src="https://avatars2.githubusercontent.com/u/812240?v=4" width="100px;" alt=""/><br /><sub><b>Boris Serdiuk</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/issues?q=author%3Ajust-boris" title="Bug reports">🐛</a> <a href="https://github.com/testing-library/jest-dom/commits?author=just-boris" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=just-boris" title="Tests">⚠️</a></td>
     <td align="center"><a href="http://danawoodman.com"><img src="https://avatars1.githubusercontent.com/u/157695?v=4" width="100px;" alt=""/><br /><sub><b>Dana Woodman</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=danawoodman" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/MoSattler"><img src="https://avatars2.githubusercontent.com/u/64152453?v=4" width="100px;" alt=""/><br /><sub><b>Mo Sattler</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=MoSattler" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/geoffrich"><img src="https://avatars2.githubusercontent.com/u/4992896?v=4" width="100px;" alt=""/><br /><sub><b>Geoff Rich</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=geoffrich" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=geoffrich" title="Tests">⚠️</a> <a href="#ideas-geoffrich" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/testing-library/jest-dom/issues?q=author%3Ageoffrich" title="Bug reports">🐛</a></td>
   </tr>
 </table>