phone-number: Update tests to v1.6.0 (#1532)
phone-number: Update tests to v1.6.0 (#1532)

Resolves #1527
behrtam/xpython,jmluy/xpython,exercism/xpython,N-Parsons/exercism-python,exercism/python,jmluy/xpython,smalley/python,exercism/xpython,behrtam/xpython,exercism/python,N-Parsons/exercism-python,smalley/python