Add test duration content and image to sets

administrator/components/com_testquestions/sql/updates/mysql/1.12.0.sql

@@ -0,0 +1,4 @@
+ALTER TABLE `#__testquestions_sets`
+  ADD COLUMN `duration` smallint unsigned NOT NULL DEFAULT 0 AFTER `title`,
+  ADD COLUMN `test_content` text NULL AFTER `duration`,
+  ADD COLUMN `image` varchar(1024) NOT NULL DEFAULT '' AFTER `test_content`;