Update @romellem as a contributor

Author: rtfpessoa

.all-contributorsrc

@@ -52,7 +52,8 @@
       "avatar_url": "https://avatars0.githubusercontent.com/u/8504000?v=4",
       "profile": "http://heyitsmattwade.com",
       "contributions": [
-        "bug"
+        "bug",
+        "code"
       ]
     },
     {

README.md

@@ -498,7 +498,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/stockmind"><img src="https://avatars3.githubusercontent.com/u/5653847?v=4?s=100" width="100px;" alt=""/><br /><sub><b>stockmind</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=stockmind" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/lantian"><img src="https://avatars3.githubusercontent.com/u/535545?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ivan Vorontsov</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=lantian" title="Code">💻</a></td>
     <td align="center"><a href="http://www.nick-brewer.com"><img src="https://avatars1.githubusercontent.com/u/129300?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Nick Brewer</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=brewern" title="Code">💻</a></td>
-    <td align="center"><a href="http://heyitsmattwade.com"><img src="https://avatars0.githubusercontent.com/u/8504000?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Matt Wade</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/issues?q=author%3Aromellem" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="http://heyitsmattwade.com"><img src="https://avatars0.githubusercontent.com/u/8504000?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Matt Wade</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/issues?q=author%3Aromellem" title="Bug reports">🐛</a> <a href="https://github.com/rtfpessoa/diff2html/commits?author=romellem" title="Code">💻</a></td>
     <td align="center"><a href="http://mrfyda.github.io"><img src="https://avatars1.githubusercontent.com/u/593860?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rafael Cortês</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=mrfyda" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/nmatpt"><img src="https://avatars2.githubusercontent.com/u/5034733?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Nuno Teixeira</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=nmatpt" title="Code">💻</a></td>
   </tr>