[cUser信息修改][修改]:调整保存字段长度及默认为null

mallinkAdmin/src/main/resources/db/migration/V201904111308__CHANGE_C_USER_INFOS.sql

@@ -0,0 +1,4 @@
+ALTER TABLE `wx_c_user`
+CHANGE COLUMN `mp_subscribe_scene` `mp_subscribe_scene` VARCHAR(30) NULL,
+CHANGE COLUMN `subs_subscribe_scene` `subs_subscribe_scene` VARCHAR(30) NULL,
+CHANGE COLUMN `open_id` `open_id` VARCHAR(28) NULL COMMENT '微信openId';