https://youtu.be/N42LQ2dLoA8 https://blog.wearewizards.io/migrating-to-gulp-4-by-example http://fettblog.eu/gulp-4-parallel-and-series/ https://github.com/cwonrails/__gulp4-postcss-example https://github.com/gulpjs/gulp/tree/4.0 https://www.liquidlight.co.uk/blog/article/how-do-i-update-to-gulp-4/
https://youtu.be/N42LQ2dLoA8
https://blog.wearewizards.io/migrating-to-gulp-4-by-example
http://fettblog.eu/gulp-4-parallel-and-series/
https://github.com/cwonrails/__gulp4-postcss-example
https://github.com/gulpjs/gulp/tree/4.0
https://www.liquidlight.co.uk/blog/article/how-do-i-update-to-gulp-4/