...Calculates the total number of years behind their respective newest versions for all dependencies listed in composer.json. Run composer global require ecoapm/libyear and make sure your global composer directory is in your $PATH. Alternatively, composer require --dev ecoapm/libyear will add libyear as a local dev dependency for your current directory's app. Download libyear.phar from the latest release, and put it in the current directory, or somewhere in your $PATH to be able to reference it from anywhere. There are obviously more nuanced ways to calculate dependency freshness. ...