Dice Object Implementation: Return an array of moves

User Story

As the developer, I want a method in the dice class that returns an array of 2 random number between 1 and 6, and if the number is the same return an array of length 4, with the selected random numbers.

Acceptance Criteria

A pseudo-random number generator is implemented, and used to create random numbers. If 2 random numbers are the same, double the array.

Dev Notes

The seed for the random number generator should be able to be set by the unit test.