zipper: update tests to v1.1.0 (#1337)
zipper: update tests to v1.1.0 (#1337)

* Move utility functions into test class body
N-Parsons/exercism-python,smalley/python,jmluy/xpython,exercism/python,behrtam/xpython,exercism/xpython,exercism/python,exercism/xpython,smalley/python,jmluy/xpython,N-Parsons/exercism-python,behrtam/xpython