Update zipp to 2.1.0

[pyup-bot]

This PR updates zipp from 0.6.0 to 2.1.0.

Changelog

2.1.0

======

32: Merge with v1.1.0.

2.0.1

======

30: Corrected version inference (from jaraco/skeleton12).

2.0.0

======

Require Python 3.6 or later.

1.1.0

======

32: For read-only zip files, complexity of ``.exists`` and
``joinpath`` is now constant time instead of ``O(n)``, preventing
quadratic time in common use-cases and rendering large
zip files unusable for Path. Big thanks to Benjy Weinberger
for the bug report and contributed fix (33).

1.0.0

======

Re-release of 0.6 to correspond with release as found in
Python 3.8.

Links

• PyPI: https://pypi.org/project/zipp
• Changelog: https://pyup.io/changelogs/zipp/
• Repo: https://github.com/jaraco/zipp

[pyup-bot]

Closing this in favor of #211