docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1,4 +1,7 @@
 # V2er-iOS
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 A beautiful V2EX client built for iOS platform. 
 
 This project is under develop, is not avaiable in App store yet, you could download it from [App Store](https://apps.apple.com/app/id1596137027)
@@ -10,6 +13,20 @@ This project is under develop, is not avaiable in App store yet, you could downl
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->
 <!-- markdownlint-disable -->
+<table>
+  <tbody>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/graycreate"><img src="https://avatars.githubusercontent.com/u/5203798?v=4?s=100" width="100px;" alt="GRAY"/><br /><sub><b>GRAY</b></sub></a><br /><a href="https://github.com/v2er-app/iOS/commits?author=graycreate" title="Code">💻</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
 
 <!-- markdownlint-restore -->
 <!-- prettier-ignore-end -->