Reduced size of book tree menu font.
- Added Percentage (%) Symbole to XSS check.
Bug fix release - EventSubscriber config error
Added Drupal 9 compatibility.
Fixes path_alias.manager so the module works with Drupal 9.
path_alias.manager
valic, mglaman, jsacksick, Sumi, chipway
Issues: 9 issues resolved.
Changes since 8.x-1.0-beta5:
Adds a guard against null cached html in the translation alter