docs: add @amitrohatgi as a contributor (#561)

* docs: update README.md [skip ci]

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -121,6 +121,15 @@
         "bug",
         "doc"
       ]
+    },
+    {
+      "login": "amitrohatgi",
+      "name": "amitrohatgi",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/12177021?v=4",
+      "profile": "https://github.com/amitrohatgi",
+      "contributions": [
+        "ideas"
+      ]
     }
   ]
 }

README.md

@@ -407,6 +407,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://charmander.me/"><img src="https://avatars1.githubusercontent.com/u/1889843?v=4" width="100px;" alt=""/><br /><sub><b>Charmander</b></sub></a><br /><a href="#question-charmander" title="Answering Questions">💬</a> <a href="https://github.com/node-formidable/node-formidable/issues?q=author%3Acharmander" title="Bug reports">🐛</a> <a href="https://github.com/node-formidable/node-formidable/commits?author=charmander" title="Code">💻</a> <a href="#ideas-charmander" title="Ideas, Planning, & Feedback">🤔</a> <a href="#maintenance-charmander" title="Maintenance">🚧</a></td>
     <td align="center"><a href="https://twitter.com/dylan_piercey"><img src="https://avatars2.githubusercontent.com/u/4985201?v=4" width="100px;" alt=""/><br /><sub><b>Dylan Piercey</b></sub></a><br /><a href="#ideas-DylanPiercey" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="http://ochrona.jawne.info.pl"><img src="https://avatars1.githubusercontent.com/u/3618479?v=4" width="100px;" alt=""/><br /><sub><b>Adam Dobrawy</b></sub></a><br /><a href="https://github.com/node-formidable/node-formidable/issues?q=author%3Aad-m" title="Bug reports">🐛</a> <a href="https://github.com/node-formidable/node-formidable/commits?author=ad-m" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/amitrohatgi"><img src="https://avatars3.githubusercontent.com/u/12177021?v=4" width="100px;" alt=""/><br /><sub><b>amitrohatgi</b></sub></a><br /><a href="#ideas-amitrohatgi" title="Ideas, Planning, & Feedback">🤔</a></td>
   </tr>
 </table>