docs: add loiacon as a contributor for code, test (#64)

* 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

@@ -101,6 +101,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "loiacon",
+      "name": "Gabriel Loiácono",
+      "avatar_url": "https://avatars.githubusercontent.com/u/32134586?v=4",
+      "profile": "https://github.com/loiacon",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "commitConvention": "none"

README.md

@@ -693,6 +693,7 @@ Thanks goes to these people ([emoji key][emojis]):
   <tr>
     <td align="center"><a href="https://github.com/ozyxdev"><img src="https://avatars.githubusercontent.com/u/83309085?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Omar Syx</b></sub></a><br /><a href="https://github.com/kentcdodds/mdx-bundler/issues?q=author%3Aozyxdev" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://github.com/gaelhameon"><img src="https://avatars.githubusercontent.com/u/17253950?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Gaël Haméon</b></sub></a><br /><a href="https://github.com/kentcdodds/mdx-bundler/commits?author=gaelhameon" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/loiacon"><img src="https://avatars.githubusercontent.com/u/32134586?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Gabriel Loiácono</b></sub></a><br /><a href="https://github.com/kentcdodds/mdx-bundler/commits?author=loiacon" title="Code">💻</a> <a href="https://github.com/kentcdodds/mdx-bundler/commits?author=loiacon" title="Tests">⚠️</a></td>
   </tr>
 </table>