- Export configuration:
drush cex
- Commit your code:
git add && git commit
- Merge upstream:
git pull
- Update dependencies:
composer install
- Run database updates:
drush updb
- Import configuration:
drush cim
- Push your code:
git push
By Fabian Bircher.
Source: https://events.drupal.org/vienna2017/sessions/advanced-configuration-management-config-split-et-al