Uncaught TypeError: $(...).once is not a function

Hi @ioana apetri,
I have fixed issue once function and also attached patch.
Please review and verify.

Quick fix:

My image is now zoomed in and out with the fallowing code in the "drupal.imagefieldzoom.js" file.

        $(once('init', this)). parent( '.image-zoom'). zoom({
            url: original_urls[$(this).attr('fid')],
            on: drupalSettings.imageFieldZoom.image_zoom_style,
            touch: drupalSettings.imageFieldZoom.image_touchscreen_compatible,
            magnify: drupalSettings.imageFieldZoom.image_magnify,
            duration: drupalSettings.imageFieldZoom.image_fade_duration
          });

Also I modified the dependencies library to be the fallowing:
- core/jquery
- core/drupal
- core/once
- core/drupalSettings

I think also this part $(this).once('init') needs to be changed according the documentation.

This is a updated patch.

In case JQuery is used, than we need to replase $ sign with JQuery word.If you want to use $ sign you have to use this:
(function ($, Drupal,once, drupalSettings) {

This is a new updated patch.

Thanks for the patch #7, @sarwan_verma, works for me.