Replace dropped require_exp and require_iat with require option

Fixed

• Removed dropped require_exp and require_iat options from jwt.decode and instead used require option with both exp and iat. For more info visit this: https://pyjwt.readthedocs.io/en/stable/changelog.html#dropped-deprecated-require-options-in-jwt-decode
• This fixes an error in the previous release which had multiple breaking changes