• Add cache:tags command to purge content by tag. (#4267)
• Allow symfony/var-dumper version 5. 637f2aa
• Fix #4256. Insufficient Error messages on failing SQL commands during site:install
• Use entity_field.manager in user field sanitize plugin. Drupal 9 compat. #4270
• More Drupal 9 compat #4272 #4273
• Use PHP 7.3.7 exclusively at Appveyor. #4271
• Fix userTest on Windows. 493467f
• Improve rsync confirm message aa47e57