Update @dirkolbrich as a contributor

Author: atomicpages

.all-contributorsrc

@@ -54,7 +54,8 @@
       "avatar_url": "https://avatars1.githubusercontent.com/u/3765119?v=4",
       "profile": "http://www.dirkolbrich.de",
       "contributions": [
-        "bug"
+        "bug",
+        "code"
       ]
     },
     {

README.md

@@ -328,7 +328,7 @@ Skeleton Sass 3 offers a far more portable solution in order to adapt to new way
     <td align="center"><a href="https://github.com/thomasvandongen"><img src="https://avatars2.githubusercontent.com/u/11245177?v=4" width="100px;" alt=""/><br /><sub><b>Thomas van Dongen</b></sub></a><br /><a href="https://github.com/atomicpages/skeleton-sass-official/issues?q=author%3Athomasvandongen" title="Bug reports">🐛</a> <a href="https://github.com/atomicpages/skeleton-sass-official/commits?author=thomasvandongen" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/seshaljain"><img src="https://avatars0.githubusercontent.com/u/11702800?v=4" width="100px;" alt=""/><br /><sub><b>Seshal Jain</b></sub></a><br /><a href="https://github.com/atomicpages/skeleton-sass-official/issues?q=author%3Aseshaljain" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://github.com/pcbulai"><img src="https://avatars1.githubusercontent.com/u/949571?v=4" width="100px;" alt=""/><br /><sub><b>Paul Bulai</b></sub></a><br /><a href="https://github.com/atomicpages/skeleton-sass-official/issues?q=author%3Apcbulai" title="Bug reports">🐛</a></td>
-    <td align="center"><a href="http://www.dirkolbrich.de"><img src="https://avatars1.githubusercontent.com/u/3765119?v=4" width="100px;" alt=""/><br /><sub><b>Dirk Olbrich</b></sub></a><br /><a href="https://github.com/atomicpages/skeleton-sass-official/issues?q=author%3Adirkolbrich" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="http://www.dirkolbrich.de"><img src="https://avatars1.githubusercontent.com/u/3765119?v=4" width="100px;" alt=""/><br /><sub><b>Dirk Olbrich</b></sub></a><br /><a href="https://github.com/atomicpages/skeleton-sass-official/issues?q=author%3Adirkolbrich" title="Bug reports">🐛</a> <a href="https://github.com/atomicpages/skeleton-sass-official/commits?author=dirkolbrich" title="Code">💻</a></td>
     <td align="center"><a href="https://bryson.cc/"><img src="https://avatars1.githubusercontent.com/u/4043157?v=4" width="100px;" alt=""/><br /><sub><b>Bryson Reece</b></sub></a><br /><a href="https://github.com/atomicpages/skeleton-sass-official/issues?q=author%3Abrysonreece" title="Bug reports">🐛</a></td>
   </tr>
   <tr>