Update our list of contributors

Author: fthomas

README.md

@@ -63,6 +63,7 @@ Thanks goes to these wonderful people for contributing to Scala Steward:
 * [Alessandro Buggin](https://github.com/abuggin)
 * [Alex](https://github.com/jhnsmth)
 * [Alex Klibisz](https://github.com/alexklibisz)
+* [Alexis Hernandez](https://github.com/AlexITC)
 * [Andrea](https://github.com/Andrea)
 * [Andrea Mistretta](https://github.com/andreami)
 * [Anil Kumar Myla](https://github.com/anilkumarmyla)