Update AUTHORS (#722)

Fixes: #711
diff --git a/AUTHORS b/AUTHORS
index 88dd02b..8c8f759 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -13,4 +13,5 @@
 Maxim Dikun <dikmax@gmail.com>
 Xavier Hainaux <xavier.hainaux@gmail.com>
 Alexey Knyazev <lexa.knyazev@gmail.com>
+Guillermo López-Anglada <guillermo.lopez@outlook.com>
 Juan Pablo Paulsen <juanpablo.paulsen@gmail.com>