Version update

version.php

@@ -27,6 +27,6 @@ defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'logstore_xapi';
 $plugin->version = 2015081002;
-$plugin->release = '0.5.0';
+$plugin->release = '0.5.1';
 $plugin->requires = 2014111000;
 $plugin->maturity = MATURITY_BETA;