Stacks and Queue

Given a Stack and a Queue JavaScript classes, implement the Queue.dequeue() method w/ a testing first approach.

N.B.: type npm t to run the tests

Tasks

add "enqueu 2, dequeue" test
add "enqueu 1, dequeue, enqueue 2, dequeue, euqueue 3, dequeue" test
add "enqueu 1, enqueue 2, dequeue, dequeue" test
add "enqueu 1, enqueue 2, enqueue 3, dequeue, dequeue, dequeue, enqueue 4, enqueue 5, dequeue, dequeue" test
add "enqueu 1, enqueue 2, enqueue 3, dequeue, enqueue 4, enqueue 5, dequeue, dequeue, dequeue, dequeue" test
add "enqueue undefined, dequeue" test
add "dequeue" test