Modify ''composer.json'' like so
<code>
        "fxp-asset": {
            "installer-paths": {
                "npm-asset-library": "vendor/npm",
                "bower-asset-library": "vendor/bower"
            }
        },
        "extra": {
            "asset-vcs-driver-options": {
                "github-no-api": true
            },
            "asset-pattern-skip-version": "(-build|-patch)"
        },
</code>