Drush is a command-line shell and scripting interface for Drupal, a veritable Swiss Army knife designed to make life easier for those who spend their working hours hacking away at the command prompt.
Full Changelog: https://github.com/drush-ops/drush/compare/12.1.3...12.2.0
Full Changelog: https://github.com/drush-ops/drush/compare/12.1.2...12.1.3
Full Changelog: https://github.com/drush-ops/drush/compare/12.1.1...12.1.2
Full Changelog: https://github.com/drush-ops/drush/compare/12.1.0...12.1.1
Full Changelog: https://github.com/drush-ops/drush/compare/12.0.2...12.1.0
Full Changelog: https://github.com/drush-ops/drush/compare/12.0.1...12.0.2
Full Changelog: https://github.com/drush-ops/drush/compare/12.0.0...12.0.1
Full Changelog: https://github.com/drush-ops/drush/compare/11.5.1...11.6.0
Full Changelog: https://github.com/drush-ops/drush/compare/11.5.1...12.0.0
Full Changelog: https://github.com/drush-ops/drush/compare/12.0.0-rc3...12.0.0-rc4