docs: add TomHotston as a contributor (#421)

* docs: update README.md

* docs: update .all-contributorsrc

.all-contributorsrc

@@ -332,6 +332,16 @@
         "test",
         "doc"
       ]
+    },
+    {
+      "login": "TomHotston",
+      "name": "Tom Hotston",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/22729355?v=4",
+      "profile": "http://tomhotston.net",
+      "contributions": [
+        "code",
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -226,6 +226,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   <tr>
     <td align="center"><a href="https://github.com/jakubclark"><img src="https://avatars0.githubusercontent.com/u/19486495?v=4" width="100px;" alt="Kuba Clark"/><br /><sub><b>Kuba Clark</b></sub></a><br /><a href="https://github.com/starship/starship/commits?author=jakubclark" title="Code">💻</a> <a href="https://github.com/starship/starship/commits?author=jakubclark" title="Documentation">📖</a> <a href="https://github.com/starship/starship/commits?author=jakubclark" title="Tests">⚠️</a></td>
     <td align="center"><a href="http://breax.org"><img src="https://avatars2.githubusercontent.com/u/862483?v=4" width="100px;" alt="Gimbar"/><br /><sub><b>Gimbar</b></sub></a><br /><a href="https://github.com/starship/starship/commits?author=gimbar" title="Code">💻</a> <a href="https://github.com/starship/starship/commits?author=gimbar" title="Tests">⚠️</a> <a href="https://github.com/starship/starship/commits?author=gimbar" title="Documentation">📖</a></td>
+    <td align="center"><a href="http://tomhotston.net"><img src="https://avatars0.githubusercontent.com/u/22729355?v=4" width="100px;" alt="Tom Hotston"/><br /><sub><b>Tom Hotston</b></sub></a><br /><a href="https://github.com/starship/starship/commits?author=TomHotston" title="Code">💻</a> <a href="https://github.com/starship/starship/commits?author=TomHotston" title="Documentation">📖</a></td>
   </tr>
 </table>