[Feature Request] Pass post_id with perform_crop ajax function

[virgo79]

Latest version of acf-image-crop (1.4.9) introduce a new filter to customize the postfix of a cropped image.
At this point could be very useful, during the execution of this filter, to know the post_id of the current post where the cropped image is attached.
This way we can strongly customize the name of a cropped image, even based of the current parent post.
This could be easily done passing the post_id variable within the perform_crop function.