[Feature] Replace tasks in gulpfile.js with exports

[benjaminbi]

🚀 Feature request

What do you want to be added? Now gulp.task is being used in gulpfile.js. However, it is no longer a recommended pattern anymore. We can replace it with exports which is the recommended one. Reference: https://gulpjs.com/docs/en/api/task/

What scenarios will this solve?

What will this allow you to do? Will this benefit other developers? This will improve the future compatibility when building through gulp.