Update zipp to 3.3.1

[pyup-bot]

This PR updates zipp from 3.1.0 to 3.3.1.

Changelog

3.3.1

======

bpo-42043: Add tests capturing subclassing requirements.

3.3.0

======

9: ``Path`` objects now expose a ``.filename`` attribute
and rely on that to resolve ``.name`` and ``.parent`` when
the ``Path`` object is at the root of the zipfile.

3.2.0

======

57 and bpo-40564: Mutate the passed ZipFile object
type instead of making a copy. Prevents issues when
both the local copy and the caller's copy attempt to
close the same file handle.

56 and bpo-41035: ``Path._next`` now honors
subclasses.

55: ``Path.is_file()`` now returns False for non-existent names.

Links

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

[codecov-io]

Codecov Report

Merging #20 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #20   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          116       116           
=========================================
  Hits           116       116           

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[pyup-bot]

Closing this in favor of #22