docs: add @quantumsheep as a contributor

Author: tunnckoCore

.all-contributorsrc

@@ -139,6 +139,17 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "quantumsheep",
+      "name": "Nathanael Demacon",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/7271496?v=4",
+      "profile": "https://qtmsheep.com",
+      "contributions": [
+        "question",
+        "code",
+        "review"
+      ]
     }
   ]
 }

README.md

@@ -409,6 +409,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <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>
     <td align="center"><a href="https://github.com/fengxinming"><img src="https://avatars2.githubusercontent.com/u/6262382?v=4" width="100px;" alt=""/><br /><sub><b>Jesse Feng</b></sub></a><br /><a href="https://github.com/node-formidable/node-formidable/issues?q=author%3Afengxinming" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="https://qtmsheep.com"><img src="https://avatars1.githubusercontent.com/u/7271496?v=4" width="100px;" alt=""/><br /><sub><b>Nathanael Demacon</b></sub></a><br /><a href="#question-quantumsheep" title="Answering Questions">💬</a> <a href="https://github.com/node-formidable/node-formidable/commits?author=quantumsheep" title="Code">💻</a> <a href="https://github.com/node-formidable/node-formidable/pulls?q=is%3Apr+reviewed-by%3Aquantumsheep" title="Reviewed Pull Requests">👀</a></td>
   </tr>
 </table>