message: [bugfix] copy style should be sync
diff: @@ -25,9 +25,9 @@ gulp.task('compile', () => {
  // copy lib files
  gulp.task('lib', ['compile'], () => {
  const ttf = glob.sync(resolve('./src/*.ttf'));
  - ttf.forEach(ttf => fs.copy(ttf, './lib/' + path.parse(ttf).base));
  - fs.copy('./lib', '../../lib/vant-css');
  - fs.copy('./lib', '../../es/vant-css');
  + ttf.forEach(ttf => fs.copySync(ttf, './lib/' + path.parse(ttf).base));
  + fs.copySync('./lib', '../../lib/vant-css');
  + fs.copySync('./lib', '../../es/vant-css');
  });
  // extract svg from sketch
  