Build: update AUTHORS.txt

AUTHORS.txt

@@ -216,10 +216,11 @@ Jakob Stoeck <jakob@pokermania.de>
 Christopher Jones <chris@cjqed.com>
 Forbes Lindesay <forbes@lindesay.co.uk>
 S. Andrew Sheppard <andrew@wq.io>
+Leonardo Balter <leonardo.balter@gmail.com>
 Roman Reiß <me@silverwind.io>
 Benjy Cui <benjytrys@gmail.com>
 Rodrigo Rosenfeld Rosas <rr.rosas@gmail.com>
 John Hoven <hovenj@gmail.com>
 Philip Jägenstedt <philip@foolip.org>
 Christian Kosmowski <ksmwsk@gmail.com>
-
+Liang Peng <poppinlp@gmail.com>