- Update to version 3.22.0:
* Update Symfony dependencies from 3.3.9 to 3.3.10
* Clean up Git service instantiation and destructor
* Remove dead code from self:install
* Rebuild warning should be redeploy
* Avoid wrapping environment IDs when formatting is involved
* Support .drush/site-aliases directory
* Check whether Drush supports YAML alias files
* Support YAML Drush aliases
* Drush fixes for supporting version 9
* Nest YAML aliases one level deeper
* Remove problematic inline comments
* Remove unnecessary method override
* More cleanup
* Remove drush argument for alias types
* Use heredoc for file header
* Refactor subdir move slightly
* Fix tests and merge between PHP and YAML aliases
* Unused import
* Clean up move errors
* Refactor getAliases() and getExistingAliases()
* Refactor reading/setting alias group
* Delete old YAML file when renaming group
* Move aliases to new directory non-interactively
* Use $app->isSingle() more often
* Reduce failures in site-aliases migration
* Fix merge of existing aliases
* Remove support checks
* Cleanup
* Fail in local:drush-aliases if no Drupal apps are found