update AUTHORS

Author: isaacs

AUTHORS

@@ -645,3 +645,6 @@ Sreeram Jayan <sreeram.jayan@cerner.com>
 --get <lars.willighagen@gmail.com>
 raywu0123 <b05901189@ntu.edu.tw>
 isaacs <nope@not.real>
+Iván Reinoso García <ireinoso@plainconcepts.com>
+Roy Marples <roy@marples.name>
+Robert James Gabriel <robert_gabriel@outlook.com>