Update pluggy to 0.5.2

[pyup-bot]

There's a new version of pluggy available.
You are currently using 0.5.1. I have updated it to 0.5.2

These links might come in handy: PyPI | Changelog | Repo

Changelog

0.5.2

---

• fix bug where firstresult wrappers were being sent an incorrectly configured
  _Result (a list was set instead of a single value). Add tests to check for
  this as well as _Result.force_result() behaviour. Thanks to tgoodlet_
  for the PR 72_.

• fix incorrect getattr of DeprecationWarning from the warnings
  module. Thanks to nicoddemus_ for the PR 77_.

• hide pytest tracebacks in certain core routines. Thanks to
  nicoddemus_ for the PR 80_.

.. _72: pytest-dev/pluggy#72
.. _77: pytest-dev/pluggy#77
.. _80: pytest-dev/pluggy#80

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖