Blackjack Testing

[beerens20]

Blackjack in the code is defined as == 21 but in the Blackjack rules it is where 21 is made up of 2 cards, the Ace and the 10. The function that checks for blackjack needs to be refactored so that it checks if the sum is 21 AND there are only 2 cards in the players hand AND if those cards are the Ace and a 10.