code: function sortByFileFormat(srcDir, format) {
    const initialFiles = `${srcDir}/*.${format}`
    const files = glob.sync(initialFiles);
    const dest = `${srcDir}/${format}`;
    let count = 0;
  
    createDirs([dest]);
  
    // Loop through and move each file
    const promises = files.map(f => {
      return new Promise((resolve, reject) => {
        const filename = sanitize(path.basename(f));
        const reg = /[\w-]+-(16|24|32)\.[\w]+/;
        const match = filename.match(reg);
        let thisDest = dest;
  
        if (match) {
          const size = match[1];
          thisDest = `${thisDest}/${size}`;
          createDirs([thisDest]);
        }
  
        fs.rename(f, `${thisDest}/${filename}`, err => {
          if (err) {
            reject(err);
          }
          count++;
          resolve(`${dest}/${filename}`);
        });
      });
    });
  
    return Promise.all(promises).then(() => {
      swlog.logTaskAction('Moved', `${count}/${files.length} ${format.toUpperCase()} files`);
    });
  }
docs: Move icon types into proper directory
  @param {String} srcDir - Directory of files
  @param {Array} formats - Array of file formats