title: How to run gulp tasks in parallel in gulp 3.9.1?
body: <pre><code>gulp.task('a', function (cb) {
    //... cb() 
  })
  
  gulp.task('b', function (cb) {
    //... cb() 
  })
  </code></pre>
  
  <p>I have two tasks, they take too match time, the question is how to run them simultaneously in order to save time?</p>
  
  <p>Gulp version - 3.9.1</p>