Add Bilal Husain to AUTHORS

Author: brson

AUTHORS.txt

@@ -22,6 +22,7 @@ Benjamin Herr <ben@0x539.de>
 Benjamin Jackman <ben@jackman.biz>
 Benjamin Kircher <benjamin.kircher@gmail.com>
 Benjamin Peterson <benjamin@python.org>
+Bilal Husain <bilal@bilalhusain.com>
 Brendan Eich <brendan@mozilla.org>
 Brian Anderson <banderson@mozilla.com>
 Brian J. Burg <burg@cs.washington.edu>