Added

• Add support for Symfony 8.0 (#1509)

Changed

• Improve performance of checking for existing Content-Type (#1518, #1519)

Fixed

• Support very large content in meta element in head (#1519)
• Support very large HTML files without a Content-Type (#1518)
• Allow numbers and underscores in CSS property names (#1500)
• Use safe version of some PHP functions
  (#1457, #1492, #1495, #1496, #1499, #1503, #1513, #1515, #1517)