* To list packages 

composer show -i

* To test upgrade of a lib with composer:

Remove entry in composer.lock
Edit composer.json to change version to "x.y.z"
composer -v update --root-reqs --no-dev --no-autoloader --dry-run ccampbell/chromephp

* To upgrade a lib with composer:

Remove entry in composer.lock
Edit composer.json to change version to "x.y.z"
composer -v update --root-reqs --no-dev --no-autoloader ccampbell/chromephp