docs: add yanivshaked as a contributor (#109)

Author: allcontributors[bot]

.all-contributorsrc

@@ -69,7 +69,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/13107481?v=4",
       "profile": "https://github.com/yanivshaked",
       "contributions": [
-        "translation"
+        "translation",
+        "code"
       ]
     }
   ],

README.md

@@ -36,7 +36,7 @@ Many thanks to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/SchnMar"><img src="https://avatars3.githubusercontent.com/u/12902321?v=4?s=50" width="50px;" alt=""/><br /><sub><b>Marcel Schneider</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3ASchnMar" title="Bug reports">🐛</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=SchnMar" title="Code">💻</a> <a href="#ideas-SchnMar" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/ganlanshu0211"><img src="https://avatars0.githubusercontent.com/u/9670379?v=4?s=50" width="50px;" alt=""/><br /><sub><b>ganlanshu0211</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3Aganlanshu0211" title="Bug reports">🐛</a> <a href="#ideas-ganlanshu0211" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/JasonHezz"><img src="https://avatars3.githubusercontent.com/u/15358765?v=4?s=50" width="50px;" alt=""/><br /><sub><b>JasonHezz</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3AJasonHezz" title="Bug reports">🐛</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=JasonHezz" title="Code">💻</a></td>
-    <td align="center"><a href="https://github.com/yanivshaked"><img src="https://avatars.githubusercontent.com/u/13107481?v=4?s=50" width="50px;" alt=""/><br /><sub><b>Yaniv Shaked</b></sub></a><br /><a href="#translation-yanivshaked" title="Translation">🌍</a></td>
+    <td align="center"><a href="https://github.com/yanivshaked"><img src="https://avatars.githubusercontent.com/u/13107481?v=4?s=50" width="50px;" alt=""/><br /><sub><b>Yaniv Shaked</b></sub></a><br /><a href="#translation-yanivshaked" title="Translation">🌍</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=yanivshaked" title="Code">💻</a></td>
   </tr>
 </table>