docs: add GuillermoCasalCaro as a contributor for code (#702)

* 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

@@ -675,6 +675,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "GuillermoCasalCaro",
+      "name": "Guillermo Casal Caro",
+      "avatar_url": "https://avatars.githubusercontent.com/u/18685581?v=4",
+      "profile": "https://github.com/GuillermoCasalCaro",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -200,6 +200,7 @@ Want to contribute? see [Contribution Guidelines][contribution]. Thanks goes to
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/amedve"><img src="https://avatars.githubusercontent.com/u/23156422?v=4?s=100" width="100px;" alt="Max Medve"/><br /><sub><b>Max Medve</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=amedve" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://maizzle.com"><img src="https://avatars.githubusercontent.com/u/1656595?v=4?s=100" width="100px;" alt="Cosmin Popovici"/><br /><sub><b>Cosmin Popovici</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=cossssmin" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/admtnnr"><img src="https://avatars.githubusercontent.com/u/27502?v=4?s=100" width="100px;" alt="Adam Tanner"/><br /><sub><b>Adam Tanner</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=admtnnr" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/GuillermoCasalCaro"><img src="https://avatars.githubusercontent.com/u/18685581?v=4?s=100" width="100px;" alt="Guillermo Casal Caro"/><br /><sub><b>Guillermo Casal Caro</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=GuillermoCasalCaro" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>