Write a program that plays rock, paper, scissors with the user.

The game will loop until a player or computer wins 3 rounds. Every round, the computer will pick a random number which will mean a value of rock, paper or scissors. Then get the input of rock, paper or scissors from the user. Use the rules of rock paper scissors to add 1 to the player score, the computer score or none if it's a draw. Once a player wins 3 rounds, exit the game and print the winner.