Update latest WP tested up to

Author: unfulvio

readme.txt

@@ -4,7 +4,7 @@ Donate link: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_i
 Tags: dev, development, bug, debug, debugging, stacktrace, php, console, terminal, browser
 Requires at least: 3.6.0
 Requires PHP: 5.6
-Tested up to: 5.2.1
+Tested up to: 5.5.3
 Stable tag: 1.6.0
 License: GPLv3 or later
 License URI: http://www.gnu.org/licenses/gpl-3.0.html