ForbidEnumInFunctionArgumentsRule shouldn't report error when SORT_REGULAR is used as second argument

[kamil-zacek]

Argument 1 in array_unique() cannot contain enum as the function causes implicit __toString conversion which is not supported for enums

For this code

$countries = [Country::CZ, Country::CZ, Country::SK];
array_unique($countries, SORT_REGULAR)

shouldn't be reported this error, because of second argument the __toString is not used for compare.

Probably there are some other combinations of other functions which check this rule where there are different default $flag for comparing method type.

[janedbal]

Released as 2.11.1