code: function () {
          var pkg = require(process.cwd() + '/package.json');
          var licenses = [];
          pkg.licenses.forEach(function (license) {
              licenses.push(license.type);
          });
  
          return '/*! ' + pkg.name + ' - v' + pkg.version + ' - ' + gutil.date("yyyy-mm-dd") + "\n" +
              (pkg.homepage ? "* " + pkg.homepage + "\n" : "") +
              '* Copyright (c) ' + gutil.date("yyyy") + ' ' + pkg.author.name +
              '; Licensed ' + licenses.join(', ') + ' */\n';
      }
docs: This method builds our license string for embedding into the compiled file