v1.0.0-rc21

e01db04 [console] Tag 1.0.0-rc21 release. (#3337)
843315c [update:execute] Display messages during update execute. (#3335)
b45770a [generate:module] Validator::trans error, fix #3320 (#3334)
0f0c8fc [console] Refactor Drupal class. (#3329)
963dd3d Fix #3176 and also remove unused libraries. (#3325)
31a7e54 [config:settings:debug] Improve output. (#3324)
78ae027 [site:mode] Rollback command. (#3323)