Bump pytest from 3.8.1 to 3.8.2

[dependabot-preview]

Bumps pytest from 3.8.1 to 3.8.2.

Changelog

Sourced from pytest's changelog.

pytest 3.8.2 (2018-10-02)

Deprecations and Removals

• #4036 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/4036>_: The item parameter of pytest_warning_captured hook is now documented as deprecated. We realized only after
  the 3.8 release that this parameter is incompatible with pytest-xdist.

  Our policy is to not deprecate features during bugfix releases, but in this case we believe it makes sense as we are
  only documenting it as deprecated, without issuing warnings which might potentially break test suites. This will get
  the word out that hook implementers should not use this parameter at all.

  In a future release item will always be None and will emit a proper warning when a hook implementation
  makes use of it.

Bug Fixes

• #3539 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/3539>_: Fix reload on assertion rewritten modules.

• #4034 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/4034>_: The .user_properties attribute of TestReport objects is a list
  of (name, value) tuples, but could sometimes be instantiated as a tuple
  of tuples. It is now always a list.

• #4039 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/4039>_: No longer issue warnings about using pytest_plugins in non-top-level directories when using --pyargs: the
  current --pyargs mechanism is not reliable and might give false negatives.

• #4040 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/4040>_: Exclude empty reports for passed tests when -rP option is used.

• #4051 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/4051>_: Improve error message when an invalid Python expression is passed to the -m option.

• #4056 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/4056>_: MonkeyPatch.setenv and MonkeyPatch.delenv issue a warning if the environment variable name is not str on Python 2.

  In Python 2, adding unicode keys to os.environ causes problems with subprocess (and possible other modules),
  making this a subtle bug specially susceptible when used with from __future__ import unicode_literals.

Improved Documentation

• #3928 <https://github-redirect.dependabot.com/pytest-dev/pytest/issues/3928>_: Add possible values for fixture scope to docs.

... (truncated)

Commits

• d3673c7 Preparing release version 3.8.2
• 25fe370 Merge pull request #4056 from nicoddemus/unicode-vars
• 1a323fb Show a warning when non-str is given to Monkeypatch.setenv
• 9d971d3 Hide internal pytest.warns traceback
• bc009a8 Fix test to comply with pypy 6.0
• 5e7d427 Merge pull request #4060 from nicoddemus/4051-changelog
• dd59ed3 Merge pull request #4059 from labcodes/documenting-scopes
• 20d0f0e Improve changelog for #4051
• d24a7e6 Issue warning if Monkeypatch.setenv/delenv receive non-strings in Python 2
• 4dc73bd Update changelog
• Additional commits viewable in compare view

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