text: const fs = require('fs-extra');
  const concat = require('concat');
  (async function build() {
    const files = [
      './dist/tc-liveapps/runtime-es2015.js',
      './dist/tc-liveapps/polyfills-es2015.js',
      './dist/tc-liveapps/main-es2015.js',
      './dist/tc-liveapps/scripts.js'
    ]
    await fs.ensureDir('elements')
    await concat(files, 'src/tcstk-elements.js');
    await fs.copyFile('./dist/tc-liveapps/styles.css', 'src/tcstk-elements.css')
  })()
  