composer outdated "drupal/*"
php -d memory_limit=-1 /usr/local/bin/composer update drupal/core-recommended --with-dependencies
If you wanted to update Drupal’s token module for example, you would use the command composer update drupal/token --with-dependencies
https://chromatichq.com/blog/using-composer-outdated-manage-drupal-depe…
composer update would upgrade all modules