docs: add icyJoseph as a contributor (#22)

* docs: update README.md [skip ci]
* docs: create .all-contributorsrc [skip ci]

Author: allcontributors[bot]

.all-contributorsrc

@@ -0,0 +1,26 @@
+{
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "contributors": [
+    {
+      "login": "icyJoseph",
+      "name": "Joseph",
+      "avatar_url": "https://avatars.githubusercontent.com/u/21013447?v=4",
+      "profile": "https://icyjoseph.dev/",
+      "contributions": [
+        "code",
+        "bug",
+        "doc"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7,
+  "projectName": "useStateMachine",
+  "projectOwner": "cassiozen",
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "skipCi": true
+}

README.md

@@ -1,4 +1,7 @@
 <p align="center">
+<!-- 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 -->
 <img src="https://user-images.githubusercontent.com/33676/111815108-4695b900-88a9-11eb-8b61-3c45b40d4df6.png" width="250" alt=""/>
 </p>
 
@@ -236,3 +239,23 @@ const [state, send] = useStateMachine<{ toggleCount: number }>({ toggleCount: 0
 - [Contributing](https://github.com/cassiozen/useStateMachine/wiki/Contributing-to-useStateMachine)
 - [Comparison with XState](https://github.com/cassiozen/useStateMachine/wiki/XState-comparison)
 - [Source code walkthrough video](https://github.com/cassiozen/useStateMachine/wiki/Source-code-walkthrough-video)
+
+## 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-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://icyjoseph.dev/"><img src="https://avatars.githubusercontent.com/u/21013447?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Joseph</b></sub></a><br /><a href="https://github.com/cassiozen/useStateMachine/commits?author=icyJoseph" title="Code">💻</a> <a href="https://github.com/cassiozen/useStateMachine/issues?q=author%3AicyJoseph" title="Bug reports">🐛</a> <a href="https://github.com/cassiozen/useStateMachine/commits?author=icyJoseph" title="Documentation">📖</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!