Add @pistou as a contributor

Author: Nader Dabit

.all-contributorsrc

@@ -178,6 +178,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "pistou",
+      "name": "Pierre Skowron",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/6703711?v=4",
+      "profile": "http://twitter.com/pistoudev",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -184,6 +184,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="http://twitter.com/dani_akash_"><img src="https://avatars3.githubusercontent.com/u/6841445?v=4" width="100px;" alt=""/><br /><sub><b>Dani Akash</b></sub></a><br /><a href="https://github.com/react-native-community/hooks/commits?author=DaniAkash" title="Code">💻</a></td>
     <td align="center"><a href="https://dylanvann.com/"><img src="https://avatars0.githubusercontent.com/u/1537615?v=4" width="100px;" alt=""/><br /><sub><b>Dylan Vann</b></sub></a><br /><a href="https://github.com/react-native-community/hooks/commits?author=DylanVann" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/thinklinux"><img src="https://avatars1.githubusercontent.com/u/326949?v=4" width="100px;" alt=""/><br /><sub><b>Tihomir Valkanov</b></sub></a><br /><a href="https://github.com/react-native-community/hooks/commits?author=thinklinux" title="Documentation">📖</a></td>
+    <td align="center"><a href="http://twitter.com/pistoudev"><img src="https://avatars1.githubusercontent.com/u/6703711?v=4" width="100px;" alt=""/><br /><sub><b>Pierre Skowron</b></sub></a><br /><a href="https://github.com/react-native-community/hooks/commits?author=pistou" title="Code">💻</a></td>
   </tr>
 </table>