Update pluggy to 1.0.0

[pyup-bot]

This PR updates pluggy from 0.8.1 to 1.0.0.

Changelog

1.0.0

=========================

Deprecations and Removals
-------------------------

- `116 <https://github.com/pytest-dev/pluggy/issues/116>`_: Remove deprecated ``implprefix`` support.
Decorate hook implementations using an instance of HookimplMarker instead.
The deprecation was announced in release ``0.7.0``.


- `120 <https://github.com/pytest-dev/pluggy/issues/120>`_: Remove the deprecated ``proc`` argument to ``call_historic``.
Use ``result_callback`` instead, which has the same behavior.
The deprecation was announced in release ``0.7.0``.


- `265 <https://github.com/pytest-dev/pluggy/issues/265>`_: Remove the ``_Result.result`` property. Use ``_Result.get_result()`` instead.
Note that unlike ``result``, ``get_result()`` raises the exception if the hook raised.
The deprecation was announced in release ``0.6.0``.


- `267 <https://github.com/pytest-dev/pluggy/issues/267>`_: Remove official support for Python 3.4.


- `272 <https://github.com/pytest-dev/pluggy/issues/272>`_: Dropped support for Python 2.
Continue to use pluggy 0.13.x for Python 2 support.


- `308 <https://github.com/pytest-dev/pluggy/issues/308>`_: Remove official support for Python 3.5.


- `313 <https://github.com/pytest-dev/pluggy/issues/313>`_: The internal ``pluggy.callers``, ``pluggy.manager`` and ``pluggy.hooks`` are now explicitly marked private by a ``_`` prefix (e.g. ``pluggy._callers``).
Only API exported by the top-level ``pluggy`` module is considered public.


- `59 <https://github.com/pytest-dev/pluggy/issues/59>`_: Remove legacy ``__multicall__`` recursive hook calling system.
The deprecation was announced in release ``0.5.0``.



Features
--------

- `282 <https://github.com/pytest-dev/pluggy/issues/282>`_: When registering a hookimpl which is declared as ``hookwrapper=True`` but whose
function is not a generator function, a ``PluggyValidationError`` exception is
now raised.

Previously this problem would cause an error only later, when calling the hook.

In the unlikely case that you have a hookwrapper that *returns* a generator
instead of yielding directly, for example:

.. code-block:: python

   def my_hook_real_implementation(arg):
       print("before")
       yield
       print("after")


   hookimpl(hookwrapper=True)
   def my_hook(arg):
       return my_hook_implementation(arg)

change it to use ``yield from`` instead:

.. code-block:: python

   hookimpl(hookwrapper=True)
   def my_hook(arg):
       yield from my_hook_implementation(arg)


- `309 <https://github.com/pytest-dev/pluggy/issues/309>`_: Add official support for Python 3.9.

0.13.1

==========================

Trivial/Internal Changes
------------------------

- `236 <https://github.com/pytest-dev/pluggy/pull/236>`_: Improved documentation, especially with regard to references.

0.13.0

==========================

Trivial/Internal Changes
------------------------

- `222 <https://github.com/pytest-dev/pluggy/issues/222>`_: Replace ``importlib_metadata`` backport with ``importlib.metadata`` from the
standard library on Python 3.8+.

0.12.0

==========================

Features
--------

- `215 <https://github.com/pytest-dev/pluggy/issues/215>`_: Switch from ``pkg_resources`` to ``importlib-metadata`` for entrypoint detection for improved performance and import time.  This time with ``.egg`` support.

0.11.0

==========================

Bug Fixes
---------

- `205 <https://github.com/pytest-dev/pluggy/issues/205>`_: Revert changes made in 0.10.0 release breaking ``.egg`` installs.

0.10.0

==========================

Features
--------

- `199 <https://github.com/pytest-dev/pluggy/issues/199>`_: Switch from ``pkg_resources`` to ``importlib-metadata`` for entrypoint detection for improved performance and import time.

0.9.0

=========================

Features
--------

- `189 <https://github.com/pytest-dev/pluggy/issues/189>`_: ``PluginManager.load_setuptools_entrypoints`` now accepts a ``name`` parameter that when given will
load only entry points with that name.

``PluginManager.load_setuptools_entrypoints`` also now returns the number of plugins loaded by the
call, as opposed to the number of all plugins loaded by all calls to this method.



Bug Fixes
---------

- `187 <https://github.com/pytest-dev/pluggy/issues/187>`_: Fix internal ``varnames`` function for PyPy3.

Links

• PyPI: https://pypi.org/project/pluggy
• Changelog: https://pyup.io/changelogs/pluggy/
• Repo: https://github.com/pytest-dev/pluggy

[pyup-bot]

Closing this in favor of #130