Bump version to coincide with new version of attendance block

version.php

@@ -22,9 +22,9 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-$plugin->version  = 2015062900;
+$plugin->version  = 2015092100;
 $plugin->requires = 2015051100;
-$plugin->release = '2.9.2.1';
+$plugin->release = '2.9.3.1';
 $plugin->maturity  = MATURITY_STABLE;
 $plugin->cron     = 0;
 $plugin->component = 'mod_attendance';