add Thijmen as author

Author: RickDBCN

composer.json

@@ -12,6 +12,10 @@
     {
       "name": "Rick de Boer",
       "email": "[email protected]"
+    },
+    {
+      "name": "Thijmen Kort",
+      "email": "[email protected]"
     }
   ],
   "require": {

src/Client.php

@@ -4,6 +4,7 @@
 
 /**
  * @author Rick de Boer <r.deboer.soer.nl>
+ * @author Thijmen Kort <[email protected]>
  *  Permission is hereby granted, free of charge,
  * to any person obtaining a copy of this software
  * and associated documentation files (the "Software"),