Update packaging to 20.8

[pyup-bot]

This PR updates packaging from 16.8 to 20.8.

Changelog

20.8

~~~~~~~~~~~~~~~~~

* Revert back to setuptools for compatibility purposes for some Linux distros (:issue:`363`)
* Do not insert an underscore in wheel tags when the interpreter version number
is more than 2 digits (:issue:`372`)

20.7

~~~~~~~~~~~~~~~~~

No unreleased changes.

20.6

~~~~~~~~~~~~~~~~~

.. note:: This release was subsequently yanked, and these changes were included in 20.7.

* Fix flit configuration, to include LICENSE files (:issue:`357`)
* Make `intel` a recognized CPU architecture for the `universal` macOS platform tag (:issue:`361`)
* Add some missing type hints to `packaging.requirements` (issue:`350`)

20.5

~~~~~~~~~~~~~~~~~

* Officially support Python 3.9 (:issue:`343`)
* Deprecate the ``LegacyVersion`` and ``LegacySpecifier`` classes (:issue:`321`)
* Handle ``OSError`` on non-dynamic executables when attempting to resolve
the glibc version string.

20.4

~~~~~~~~~~~~~~~~~

* Canonicalize version before comparing specifiers. (:issue:`282`)
* Change type hint for ``canonicalize_name`` to return
``packaging.utils.NormalizedName``.
This enables the use of static typing tools (like mypy) to detect mixing of
normalized and un-normalized names.

20.3

~~~~~~~~~~~~~~~~~

* Fix changelog for 20.2.

20.2

~~~~~~~~~~~~~~~~~

* Fix a bug that caused a 32-bit OS that runs on a 64-bit ARM CPU (e.g. ARM-v8,
aarch64), to report the wrong bitness.

20.1

~~~~~~~~~~~~~~~~~~~

* Fix a bug caused by reuse of an exhausted iterator. (:issue:`257`)

20.0

~~~~~~~~~~~~~~~~~

* Add type hints (:issue:`191`)

* Add proper trove classifiers for PyPy support (:issue:`198`)

* Scale back depending on ``ctypes`` for manylinux support detection (:issue:`171`)

* Use ``sys.implementation.name`` where appropriate for ``packaging.tags`` (:issue:`193`)

* Expand upon the API provded by ``packaging.tags``: ``interpreter_name()``, ``mac_platforms()``, ``compatible_tags()``, ``cpython_tags()``, ``generic_tags()`` (:issue:`187`)

* Officially support Python 3.8 (:issue:`232`)

* Add ``major``, ``minor``, and ``micro`` aliases to ``packaging.version.Version`` (:issue:`226`)

* Properly mark ``packaging`` has being fully typed by adding a `py.typed` file (:issue:`226`)

19.2

~~~~~~~~~~~~~~~~~

* Remove dependency on ``attrs`` (:issue:`178`, :issue:`179`)

* Use appropriate fallbacks for CPython ABI tag (:issue:`181`, :issue:`185`)

* Add manylinux2014 support (:issue:`186`)

* Improve ABI detection (:issue:`181`)

* Properly handle debug wheels for Python 3.8 (:issue:`172`)

* Improve detection of debug builds on Windows (:issue:`194`)

19.1

~~~~~~~~~~~~~~~~~

* Add the ``packaging.tags`` module. (:issue:`156`)

* Correctly handle two-digit versions in ``python_version`` (:issue:`119`)

19.0

~~~~~~~~~~~~~~~~~

* Fix string representation of PEP 508 direct URL requirements with markers.

* Better handling of file URLs

This allows for using ``file:///absolute/path``, which was previously
prevented due to the missing ``netloc``.

This allows for all file URLs that ``urlunparse`` turns back into the
original URL to be valid.

18.0

~~~~~~~~~~~~~~~~~

* Improve error messages when invalid requirements are given. (:issue:`129`)

17.1

~~~~~~~~~~~~~~~~~

* Fix ``utils.canonicalize_version`` when supplying non PEP 440 versions.

17.0

~~~~~~~~~~~~~~~~~

* Drop support for python 2.6, 3.2, and 3.3.

* Define minimal pyparsing version to 2.0.2 (:issue:`91`).

* Add ``epoch``, ``release``, ``pre``, ``dev``, and ``post`` attributes to
``Version`` and ``LegacyVersion`` (:issue:`34`).

* Add ``Version().is_devrelease`` and ``LegacyVersion().is_devrelease`` to
make it easy to determine if a release is a development release.

* Add ``utils.canonicalize_version`` to canonicalize version strings or
``Version`` instances (:issue:`121`).

Links

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