Doesn't trigger when dragging a folder in to the project

[mathieuspil]

Heya,

First off thank you for the package, it has been of great value to my project.

I am on Mac OSX, and using Gulp 4 with gulp-watch.

Everything seemed to work for a very long time, but there is an edge case that I don't know how to resolve:

So I am watching a components-folder for any files changing.
Relevant part:

gulp.watch(['components/**/*.scss'])
  .on("add", function(path, stats) {
    // do stuff
  })
...

This works great if I drag in a .scss file in to the components-folder.
It also works if I copy + paste a folder containing a .scss file in to the components-folder.
If also works if I drag and drop a .scss file from one subfolder from the components-folder, to another subfolder of the components-folder.

However it doesn't work when I drag a folder containing a .scss file in to the components-folder.

Mind you, by dragging it in to the components-folder, I am not symlinking anything, I am merely changing the position of the folder on my local system.

This being weird, I was thinking that maybe internally in OSX, the file doesn't actually move, only the folder containing it?

As an extra indication: (Not sure if this one is helpfull, or making it more confusing) If I have a file in components/component-a/style.scss, and I rename the folder from "component-a" to "component-b", nothing gets triggered. (add, change or unlink)

Please let me know if you need more information, or if you can point me in the right direction :)