Textbook: Bump version number.

textbook/style.css

@@ -4,7 +4,7 @@ Theme URI: http://wordpress.com/theme/textbook/
 Author: Automattic
 Author URI: https://wordpress.com/themes/
 Description: TextBook is a theme for colleges, schools and organizations focused on education.
-Version: 1.1.6-wpcom
+Version: 1.1.7-wpcom
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Text Domain: textbook