laon2019 브랜치를 확인해주세요 😀

1주차 : https://github.com/laon2019/javascript-baseball-6

2주차 : https://github.com/laon2019/javascript-racingcar-6

3주차 : https://github.com/laon2019/javascript-lotto-6

4주차 : https://github.com/laon2019/javascript-christmas-6-laon2019