Changes in 2.2

• This version works with Moodle 4.0. However, this is a minimal change to make it work. In future, we can probably improve how it works, to better take advantage of the new question bank features.
• There is now an admin option where you can add additional 'Authorized secrets'. You need to use this is you are transferring content with embedded questions from other Moodle sites, so that the security checking of those embedded questions works.
• When an embedded question cannot be shown, the errors for teachers are now more informative.
• The feature related to migrating idnumbers when you moved form Moodle 3.5 to 3.6 has been removed.