Check if there are any packages which need upgrade

gulp-check.js

gulp.task("package-check", function () {

    // Output the packages which needs upgrade
    var format = function (upgraded) {

        var packages = Object.keys(upgraded);

        console.log("Following packages needs to be upgraded:");

        packages.forEach(function (packageName)
        {
            var current   = package.dependencies[packageName];
            var upgradeTo = upgraded[packageName];

            var line = util.format("  %s %s ⇾ %s",
                packageName, current, upgradeTo);

            console.log(line);
        })

        return upgraded;
    };

    var options = {
        packageData: JSON.stringify(package),
        prod: true,
    };

    return ncu
        .run(options)
        .then(format);
});