Update @wesssel as a contributor

Author: rtfpessoa

.all-contributorsrc

@@ -98,7 +98,8 @@
       "avatar_url": "https://avatars2.githubusercontent.com/u/7767299?v=4",
       "profile": "http://wesssel.github.io/",
       "contributions": [
-        "security"
+        "security",
+        "code"
       ]
     },
     {

README.md

@@ -505,7 +505,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   <tr>
     <td align="center"><a href="https://saino.me/"><img src="https://avatars0.githubusercontent.com/u/1567423?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Koki Oyatsu</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/issues?q=author%3Akaishuu0123" title="Bug reports">🐛</a> <a href="https://github.com/rtfpessoa/diff2html/commits?author=kaishuu0123" title="Code">💻</a></td>
     <td align="center"><a href="http://www.jamesmonger.com"><img src="https://avatars2.githubusercontent.com/u/2037007?v=4?s=100" width="100px;" alt=""/><br /><sub><b>James Monger</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=Jameskmonger" title="Documentation">📖</a></td>
-    <td align="center"><a href="http://wesssel.github.io/"><img src="https://avatars2.githubusercontent.com/u/7767299?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Wessel van der Pal</b></sub></a><br /><a href="#security-wesssel" title="Security">🛡️</a></td>
+    <td align="center"><a href="http://wesssel.github.io/"><img src="https://avatars2.githubusercontent.com/u/7767299?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Wessel van der Pal</b></sub></a><br /><a href="#security-wesssel" title="Security">🛡️</a> <a href="https://github.com/rtfpessoa/diff2html/commits?author=wesssel" title="Code">💻</a></td>
     <td align="center"><a href="https://jung-kim.github.io"><img src="https://avatars2.githubusercontent.com/u/5281068?v=4?s=100" width="100px;" alt=""/><br /><sub><b>jk-kim</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/commits?author=jung-kim" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/sss0791"><img src="https://avatars1.githubusercontent.com/u/1446970?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sergey Semenov</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/issues?q=author%3Asss0791" title="Bug reports">🐛</a></td>
     <td align="center"><a href="http://researcher.watson.ibm.com/researcher/view.php?person=us-nickm"><img src="https://avatars3.githubusercontent.com/u/4741620?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Nick Mitchell</b></sub></a><br /><a href="https://github.com/rtfpessoa/diff2html/issues?q=author%3Astarpit" title="Bug reports">🐛</a> <a href="https://github.com/rtfpessoa/diff2html/commits?author=starpit" title="Code">💻</a></td>