[prep-release-3.1.1] Add 3.1.1 migration file

phpBB/phpbb/db/migration/data/v31x/v311.php

@@ -0,0 +1,32 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v31x;
+
+class v311 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v310\gold',
+			'\phpbb\db\migration\data\v31x\style_update',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.1.1')),
+		);
+	}
+}