docs: add joel-hamilton as a contributor for code (#674)

* docs: update README.md [skip ci]

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

---------

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

.all-contributorsrc

@@ -667,6 +667,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "joel-hamilton",
+      "name": "Joel Hamilton",
+      "avatar_url": "https://avatars.githubusercontent.com/u/12899024?v=4",
+      "profile": "https://github.com/joel-hamilton",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -181,6 +181,7 @@ Want to contribute? see [Contribution Guidelines][contribution]. Thanks goes to
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/brunodccarvalho"><img src="https://avatars.githubusercontent.com/u/24962950?v=4?s=100" width="100px;" alt="Bruno Carvalho"/><br /><sub><b>Bruno Carvalho</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=brunodccarvalho" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/fupengl"><img src="https://avatars.githubusercontent.com/u/20211964?v=4?s=100" width="100px;" alt="傅鹏"/><br /><sub><b>傅鹏</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=fupengl" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/joel-hamilton"><img src="https://avatars.githubusercontent.com/u/12899024?v=4?s=100" width="100px;" alt="Joel Hamilton"/><br /><sub><b>Joel Hamilton</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=joel-hamilton" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>