Update setuptools to 52.0.0

[pyup-bot]

This PR updates setuptools from 51.1.1 to 52.0.0.

Changelog

52.0.0

-------


Breaking Changes
^^^^^^^^^^^^^^^^
* 2537: Remove fallback support for fetch_build_eggs using easy_install. Now pip is required for setup_requires to succeed.
* 2544: Removed 'easy_install' top-level model (runpy entry point) and 'easy_install' console script.
* 2545: Removed support for eggsecutables.

Changes
^^^^^^^
* 2459: Tests now run in parallel via pytest-xdist, completing in about half the time. Special thanks to :user:`webknjaz` for hard work implementing test isolation. To run without parallelization, disable the plugin with ``tox -- -p no:xdist``.

51.3.3

-------


Misc
^^^^
* 2539: Fix AttributeError in Description validation.

51.3.2

-------


Misc
^^^^
* 1390: Validation of Description field now is more lenient, emitting a warning and mangling the value to be valid (replacing newlines with spaces).

51.3.1

-------


Misc
^^^^
* 2536: Reverted tag deduplication handling.

51.3.0

-------


Changes
^^^^^^^
* 1390: Newlines in metadata description/Summary now trigger a ValueError.
* 2481: Define ``create_module()`` and ``exec_module()`` methods in ``VendorImporter``
to get rid of ``ImportWarning`` -- by :user:`hroncok`
* 2489: ``pkg_resources`` behavior for zipimport now matches the regular behavior, and finds
``.egg-info`` (previoulsy would only find ``.dist-info``) -- by :user:`thatch`
* 2529: Fixed an issue where version tags may be added multiple times

51.2.0

-------


Changes
^^^^^^^
* 2493: Use importlib.import_module() rather than the deprectated loader.load_module()
in pkg_resources namespace delaration -- by :user:`encukou`

Documentation changes
^^^^^^^^^^^^^^^^^^^^^
* 2525: Fix typo in the document page about entry point. -- by :user:`jtr109`

Misc
^^^^
* 2534: Avoid hitting network during test_easy_install.

51.1.2

-------


Misc
^^^^
* 2505: Disable inclusion of package data as it causes 'tests' to be included as data.

Links

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

[duckinator]

bors r+

[bors]

Merge conflict.

[duckinator]

bors retry

[bors]

Build succeeded:

• FreeBSD LANG:C.UTF-8 LC_ALL:C.UTF-8 PYTHON:3.7
• FreeBSD LANG:C.UTF-8 LC_ALL:C.UTF-8 PYTHON:3.8
• FreeBSD LANG:en_US.UTF-8 LC_ALL:en_US.UTF-8 PYTHON:3.6
• Lint
• Linux container:python:3.6-slim
• Linux container:python:3.7-slim
• Linux container:python:3.8-slim
• macOS
• Windows PYTHON:3.6.8
• Windows PYTHON:3.7.9
• Windows PYTHON:3.8.6
• Windows PYTHON:3.9.0