Log Message:
py-zipp: update to 3.1.0.

v3.1.0
======

#47: ``.open`` now raises ``FileNotFoundError`` and
``IsADirectoryError`` when appropriate.

v3.0.0
======

#44: Merge with v1.2.0.

v1.2.0
======

#44: ``zipp.Path.open()`` now supports a compatible signature
as ``pathlib.Path.open()``, accepting text (default) or binary
modes and soliciting keyword parameters passed through to
``io.TextIOWrapper`` (encoding, newline, etc). The stream is
opened in text-mode by default now. ``open`` no
longer accepts ``pwd`` as a positional argument and does not
accept the ``force_zip64`` parameter at all. This change is
a backward-incompatible change for that single function.

v2.2.1
======

#43: Merge with v1.1.1.

v1.1.1
======

#43: Restored performance of implicit dir computation.

v2.2.0
======

#36: Rebuild package with minimum Python version declared both
in package metadata and in the python tag.

v2.1.0
======

#32: Merge with v1.1.0.

v1.1.0
======

#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).

v2.0.1
======

#30: Corrected version inference (from jaraco/skeleton#12).

v2.0.0
======

Require Python 3.6 or later.