问使用gulp将es6脚本转换为JS

EN

  var gulp = require('gulp');
  var babel = require('gulp-babel');
  gulp.task('scripts',function(){
      return gulp.src(['src/scripts/app.js'])
      .pipe(babel({presets:['es2015']}))
      .pipe(gulp.dest('build/scripts/'))
  });

const hello = (name) => {
    return `hello ${name}`; 
};