dominoes: update tests to v2.1.0 (#1338)
dominoes: update tests to v2.1.0 (#1338)


N-Parsons/exercism-python,behrtam/xpython,behrtam/xpython,exercism/xpython,N-Parsons/exercism-python,exercism/python,jmluy/xpython,smalley/python,smalley/python,exercism/xpython,exercism/python,jmluy/xpython