Create a method named max. max should accept an array of objects that implement OurComparable and return the maximum. Require that the array be non-empty.

As a reminder, compareTo returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the passed object. Kotlin also allows you to use comparison operators directly with classes that implement compareTo. OurComparable works exactly the same as the official Comparable interface, except it is slightly simplified and does not accept a type parameter.