Merge branch 'nette-3' into 'master'

.gitlab-ci.yml

composer.json

phpunit.xml

src/App.php

src/ConfiguratorExtension.php

src/Console/CleanerCommand.php

src/Console/CleanerIgnoredCommand.php

src/DI/CleanerExtension.php

src/DI/CleanerIgnoredExtension.php