Just the Drupal 9 compatibility.
Issue #2931837 Cannot read property 'pages' of undefined
Issue #2931833 Cannot read property 'pages' of undefined
#2695395 Theme function and template file name
Little improvements and bug fixes
Integration with Libraries API #2553751 Correct support of localization #2554021
Corrected some bugs
Now this functionality disabled on admin pages by default. You can configure it on the settings page.
