- update to 28.3.0:
* #809: In ``find_packages()``, restore support for excluding
a parent package without excluding a child package.
* #805: Disable ``-nspkg.pth`` behavior on Python 3.3+ where
PEP-420 functionality is adequate. Fixes pip #1924.
* #803: Bump certifi to 2016.9.26.
* #733: Do not search excluded directories for packages.
This introduced a backwards incompatible change in ``find_packages()``
so that ``find_packages(exclude=['foo']) == []``, excluding subpackages of ``foo``.
Previously, ``find_packages(exclude=['foo']) == ['foo.bar']``,
even though the parent ``foo`` package was excluded.
* #795: Bump certifi.
* #719: Suppress decoding errors and instead log a warning
when metadata cannot be decoded.
* #790: In MSVC monkeypatching, explicitly patch each
function by name in the target module instead of inferring
the module from the function's ``__module__``. Improves
compatibility with other packages that might have previously
patched distutils functions (i.e. NumPy).
* #794: In test command, add installed eggs to PYTHONPATH
when invoking tests so that subprocesses will also have the
dependencies available. Fixes `tox 330
`_.
* #795: Update vendored pyparsing 2.1.9.
* #520 and #513: Suppress ValueErrors in fixup_namespace_packages
when lookup fails.
* Nicer, more consistent interfaces for msvc monkeypatching.
* #779 via #781: Fix circular import.
* #778: Fix MSVC monkeypatching.
* Introduce the (private) ``monkey`` module to encapsulate