Add @ShMcK as a contributor

.all-contributorsrc

@@ -19,6 +19,15 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "ShMcK",
+      "name": "ShMcK",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/4660659?v=4",
+      "profile": "http://medium.com/@shmck",
+      "contributions": [
+        "doc"
+      ]
     }
   ]
 }

README.md

@@ -376,8 +376,8 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-| [<img src="https://avatars2.githubusercontent.com/u/886041?v=4" width="100px;"/><br /><sub><b>David Smith</b></sub>](http://avaragado.org)<br />[📖](https://github.com/avaragado/xstateful-react/commits?author=avaragado "Documentation") [💻](https://github.com/avaragado/xstateful-react/commits?author=avaragado "Code") [⚠️](https://github.com/avaragado/xstateful-react/commits?author=avaragado "Tests") |
-| :---: |
+| [<img src="https://avatars2.githubusercontent.com/u/886041?v=4" width="100px;"/><br /><sub><b>David Smith</b></sub>](http://avaragado.org)<br />[📖](https://github.com/avaragado/xstateful-react/commits?author=avaragado "Documentation") [💻](https://github.com/avaragado/xstateful-react/commits?author=avaragado "Code") [⚠️](https://github.com/avaragado/xstateful-react/commits?author=avaragado "Tests") | [<img src="https://avatars0.githubusercontent.com/u/4660659?v=4" width="100px;"/><br /><sub><b>ShMcK</b></sub>](http://medium.com/@shmck)<br />[📖](https://github.com/avaragado/xstateful-react/commits?author=ShMcK "Documentation") |
+| :---: | :---: |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!