ft/aurelia_project/tasks/copy-data.js

import gulp from 'gulp';

function copyDataToPL() {
  let sourceDataFiles = ['test/data/**'];
  let destinationData = '../pattern-library/public/data/';
  return gulp.src(sourceDataFiles)
		.pipe(gulp.dest(destinationData));
}

export default gulp.series(
  copyDataToPL
);