Correct way to add bower-asset to composer.json

composer config repositories.asset-packagist composer https://asset-packagist.org
composer config --json --merge extra.installer-types '["bower-asset", "npm-asset"]'
composer config --json --merge 'extra.installer-paths.web/libraries/{$name}' '["type:bower-asset", "type:npm-asset"]'

(From https://www.drupal.org/project/drupal/issues/3198245#comment-13997741)