ArrayType::unique with strict comparison

[tomasfejfar]

By default array_unique converts values to string.

When using Enum classes with array_unique you'll get PHP Warning: Uncaught Object of class Some\EnumType could not be converted to string unless you specify optional SORT_REGULAR parameter. And even then filtering array ['1', 1] will yield ['1'].

ArrayType::unique solves this by using strict comparison using ArrayType::inArray.

Supersedes #7