docs: add @gabipetrovay as a contributor

Author: tunnckoCore

.all-contributorsrc

@@ -159,6 +159,16 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "gabipetrovay",
+      "name": "Gabriel Petrovay",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1170398?v=4",
+      "profile": "https://github.com/gabipetrovay",
+      "contributions": [
+        "bug",
+        "code"
+      ]
     }
   ]
 }

README.md

@@ -413,6 +413,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/MunMunMiao"><img src="https://avatars1.githubusercontent.com/u/18216142?v=4" width="100px;" alt=""/><br /><sub><b>MunMunMiao</b></sub></a><br /><a href="https://github.com/node-formidable/node-formidable/issues?q=author%3AMunMunMiao" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="https://github.com/gabipetrovay"><img src="https://avatars0.githubusercontent.com/u/1170398?v=4" width="100px;" alt=""/><br /><sub><b>Gabriel Petrovay</b></sub></a><br /><a href="https://github.com/node-formidable/node-formidable/issues?q=author%3Agabipetrovay" title="Bug reports">🐛</a> <a href="https://github.com/node-formidable/node-formidable/commits?author=gabipetrovay" title="Code">💻</a></td>
   </tr>
 </table>