How to use the serialport/package.json.version function in serialport

function VirtualSerialPortFactory() {
    try {
        var SerialPort = require('serialport');
        var serialportPackage = require('serialport/package.json');
        var semver = require('semver');

        // for v2.x serialport API
        if(semver.satisfies(serialportPackage.version, '<3.X')) {
            this.SerialPort = VirtualSerialPort;
            this.parsers = SerialPort.parsers;
            return this;
        }

        VirtualSerialPort.parsers = SerialPort.parsers;
        return VirtualSerialPort;
    } catch (error) {
        console.warn('VirtualSerialPort - NO parsers available');
    }

    return VirtualSerialPort;
}