gulpfile.js

gulp.task('copy:globalize:deps', () =>
  gulp.src([
    'node_modules/cldrjs/dist/cldr.js',
    'node_modules/cldrjs/dist/cldr/event.js',
    'node_modules/cldrjs/dist/cldr/supplemental.js',
  ]).pipe(plugins().concat('cldr.js'))
    .pipe(gulp.dest(`${dirs.dist}/js/vendor`))
);

gulp.task('copy:globalize', () =>
  gulp.src([
    'node_modules/globalize/dist/globalize.js',
    'node_modules/globalize/dist/globalize/message.js',
    'node_modules/globalize/dist/globalize/number.js',
    'node_modules/globalize/dist/globalize/plural.js',
    'node_modules/globalize/dist/globalize/date.js',
    'node_modules/globalize/dist/globalize/currency.js',
    'node_modules/globalize/dist/globalize/relative-time.js',
    'node_modules/globalize/dist/globalize/unit.js',
  ]).pipe(plugins().concat('globalize.js'))
    .pipe(gulp.dest(`${dirs.dist}/js/vendor`))
);

...

gulp.task('copy', [
  'copy:.htaccess',
  'copy:index.html',
  'copy:jquery',
  'copy:globalize:deps',
  'copy:globalize',
  'copy:license',
  'copy:main.css',
  'copy:misc',
  'copy:normalize'
]);