Gulp: did you forget to signal async completion? Did you forget to signal async completion is a very common error for Gulp 4 users. Before Gulp 4, when we used Gulp 3.9.1 etc, everything works fine. We updated to version 4 and now what? Well, Gulp changed a lot and we need to update our gulp files. Let’s see one: [crayon-639336c135d34038366649/] This is one task from one of my projects. It runs smoothly with Gulp 3.9.1. But when I upgraded to Gulp 4, I got this did you forget to signal async completion error while running gulpfile.js. So, what to do? We must adjust our code a little bit, like…