Issue #109 unique key for an arrays of json objects

[GooDGreY]

I also had the same problem, as people in issue#109.
For example with json like this:

{
    "bookings": [
        {
            "booking_id": "1d7a81b0-e0c4-441d-9fe4-48dfb776d8e7", 
            "created_at": "2023-09-07T07:28:57.822Z"
        },
           {
            "booking_id": "2a6a97b0-e0c4-441d-9fe4-48dfb776f1a8", 
            "created_at": "2023-09-07T08:28:55.823Z"
        }
    ]
}

And custom comparator like this:

CustomComparator customComparator = new CustomComparator(
        JSONCompareMode.LENIENT, 
        new Customization("**." + CREATED_AT, (o1, o2) -> true)
);

So "created_at" should be ignored, but AbstractComparator makes decision to use "created_at" as a unique key, when comparing elements in an array, so assertion fails. I fixed it, making it possible to pass unique key name as a parameter. For the example above, I would need to pass "booking_id" as a unique key for correct assertion