Support Laravel 11.x and future

[pyrou]

Since Laravel API looks pretty stable over latest version (8,9,10,11) regarding validation area.
There is a good chance this package can traverse a decade.

Instead of simply adding ||^11.0 and again ||^12.0 in few months, I propose to simply stick with a >=5.4.

[REBELinBLUE]

Thanks, I haven't looked at this package in a long time, will take a look over the next few days just to test it as I noticed an open issue also