docs: add ddehart as a contributor (#307)

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -154,6 +154,15 @@
         "code",
         "doc"
       ]
+    },
+    {
+      "login": "ddehart",
+      "name": "ddehart",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/901215?v=4",
+      "profile": "https://github.com/ddehart",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -14,7 +14,7 @@ practices.
 
 <!-- prettier-ignore-start -->
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-15-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-16-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 <!-- prettier-ignore-end -->
 
@@ -158,6 +158,7 @@ Thanks goes to these people ([emoji key][emojis]):
   </tr>
   <tr>
     <td align="center"><a href="https://aganglada.com"><img src="https://avatars0.githubusercontent.com/u/922348?v=4" width="100px;" alt=""/><br /><sub><b>Alejandro Garcia Anglada</b></sub></a><br /><a href="https://github.com/testing-library/testing-playground/commits?author=aganglada" title="Code">💻</a> <a href="https://github.com/testing-library/testing-playground/commits?author=aganglada" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/ddehart"><img src="https://avatars3.githubusercontent.com/u/901215?v=4" width="100px;" alt=""/><br /><sub><b>ddehart</b></sub></a><br /><a href="https://github.com/testing-library/testing-playground/commits?author=ddehart" title="Code">💻</a></td>
   </tr>
 </table>