docs: update README.md

Author: allcontributors[bot]

README.md

@@ -1,4 +1,5 @@
 # react-swipeable-list
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors)
 
 <h3 align="center">
   Swipeable list component for React.
@@ -40,3 +41,19 @@ yarn add sandstreamdev/react-swipeable-list
 ## License
 
 [MIT](LICENSE).
+
+## Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore -->
+<table>
+  <tr>
+    <td align="center"><a href="https://github.com/marekrozmus"><img src="https://avatars3.githubusercontent.com/u/26272040?v=4" width="100px;" alt="marekrozmus"/><br /><sub><b>marekrozmus</b></sub></a><br /><a href="https://github.com/sandstreamdev/react-swipeable-list/commits?author=marekrozmus" title="Code">💻</a> <a href="https://github.com/sandstreamdev/react-swipeable-list/commits?author=marekrozmus" title="Documentation">📖</a> <a href="https://github.com/sandstreamdev/react-swipeable-list/commits?author=marekrozmus" title="Tests">⚠️</a></td>
+  </tr>
+</table>
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!