Kuznetsov-Ilia

const PLUGIN_NAME = 'gulp-pngquant';
var through = require('through2');
var gutil = require('gulp-util');
var log = gutil.log;
var PluginError = gutil.PluginError;
var pngquant = require('pngquant');

module.exports = function (options) {
  var stream = through.obj(function (file, enc, callback) {
    if (file.isNull()) {