docs: add flexbox as a contributor for doc, and review (#192)

* docs: update README.md

* docs: update .all-contributorsrc

---------

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

.all-contributorsrc

@@ -19,6 +19,16 @@
         "ideas"
       ]
     },
+    {
+      "login": "flexbox",
+      "name": "David Leuliette",
+      "avatar_url": "https://avatars.githubusercontent.com/u/360936?v=4",
+      "profile": "https://davidl.fr",
+      "contributions": [
+        "doc",
+        "review"
+      ]
+    },
     {
       "login": "mazenchami",
       "name": "Mazen Chami",

README.md

@@ -122,6 +122,7 @@ Running `yarn build` inside of an expo module workspace will start watch mode fo
   <tbody>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/aiden-petersen"><img src="https://avatars.githubusercontent.com/u/11483212?v=4?s=100" width="100px;" alt="Aiden Petersen"/><br /><sub><b>Aiden Petersen</b></sub></a><br /><a href="#code-aiden-petersen" title="Code">💻</a> <a href="#maintenance-aiden-petersen" title="Maintenance">🚧</a> <a href="#ideas-aiden-petersen" title="Ideas, Planning, & Feedback">🤔</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://davidl.fr"><img src="https://avatars.githubusercontent.com/u/360936?v=4?s=100" width="100px;" alt="David Leuliette"/><br /><sub><b>David Leuliette</b></sub></a><br /><a href="#doc-flexbox" title="Documentation">📖</a> <a href="#review-flexbox" title="Reviewed Pull Requests">👀</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/ellouzeskandercs"><img src="https://avatars.githubusercontent.com/u/51904486?v=4?s=100" width="100px;" alt="ellouzeskandercs"/><br /><sub><b>ellouzeskandercs</b></sub></a><br /><a href="#doc-ellouzeskandercs" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/cdanwards"><img src="https://avatars.githubusercontent.com/u/8878532?v=4?s=100" width="100px;" alt="Daniel Edwards"/><br /><sub><b>Daniel Edwards</b></sub></a><br /><a href="#design-cdanwards" title="Design">🎨</a> <a href="#doc-cdanwards" title="Documentation">📖</a> <a href="#review-cdanwards" title="Reviewed Pull Requests">👀</a></td>
       <td align="center" valign="top" width="14.28%"><a href="http://gantlaborde.com/"><img src="https://avatars.githubusercontent.com/u/997157?v=4?s=100" width="100px;" alt="Gant Laborde"/><br /><sub><b>Gant Laborde</b></sub></a><br /><a href="#doc-GantMan" title="Documentation">📖</a> <a href="#ideas-GantMan" title="Ideas, Planning, & Feedback">🤔</a></td>