Update coverage to 4.4

[pyup-bot]

There's a new version of coverage available.
You are currently using 4.3.4. I have updated it to 4.4

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

Changelog

4.4

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• Reports could produce the wrong file names for packages, reporting pkg.py
  instead of the correct pkg/__init__.py. This is now fixed. Thanks, Dirk
  Thomas.

• XML reports could produce <source> and <class> lines that together
  didn't specify a valid source file path. This is now fixed. (issue 526_)

• Namespace packages are no longer warned as having no code. (issue 572_)

• Code that uses sys.settrace(sys.gettrace()) in a file that wasn't being
  coverage-measured would prevent correct coverage measurement in following
  code. An example of this was running doctests programmatically. This is now
  fixed. (issue 575_)

• Errors printed by the coverage command now go to stderr instead of
  stdout.

• Running coverage xml in a directory named with non-ASCII characters would
  fail under Python 2. This is now fixed. (issue 573_)

.. _issue 526: https://bitbucket.org/ned/coveragepy/issues/526/generated-xml-invalid-paths-for-cobertura
.. _issue 572: https://bitbucket.org/ned/coveragepy/issues/572/no-python-source-warning-for-namespace
.. _issue 573: https://bitbucket.org/ned/coveragepy/issues/573/cant-generate-xml-report-if-some-source
.. _issue 575: https://bitbucket.org/ned/coveragepy/issues/575/running-doctest-prevents-complete-coverage

4.4b1

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• Some warnings can now be individually disabled. Warnings that can be
  disabled have a short name appended. The [run] disable_warnings setting
  takes a list of these warning names to disable. Closes both issue 96_ and
  issue 355_.

• The XML report now includes attributes from version 4 of the Cobertura XML
  format, fixing issue 570_.

• In previous versions, calling a method that used collected data would prevent
  further collection. For example, save(), report(), html_report(), and
  others would all stop collection. An explicit start() was needed to get it
  going again. This is no longer true. Now you can use the collected data and
  also continue measurement. Both issue 79_ and issue 448_ described this
  problem, and have been fixed.

• Plugins can now find unexecuted files if they choose, by implementing the
  find_executable_files method. Thanks, Emil Madsen.

• Minimal IronPython support. You should be able to run IronPython programs
  under coverage run, though you will still have to do the reporting phase
  with CPython.

• Coverage.py has long had a special hack to support CPython's need to measure
  the coverage of the standard library tests. This code was not installed by
  kitted versions of coverage.py. Now it is.

.. _issue 79: https://bitbucket.org/ned/coveragepy/issues/79/save-prevents-harvesting-on-stop
.. _issue 96: https://bitbucket.org/ned/coveragepy/issues/96/unhelpful-warnings-produced-when-using
.. _issue 355: https://bitbucket.org/ned/coveragepy/issues/355/warnings-should-be-suppressable
.. _issue 448: https://bitbucket.org/ned/coveragepy/issues/448/save-and-html_report-prevent-further
.. _issue 570: https://bitbucket.org/ned/coveragepy/issues/570/cobertura-coverage-04dtd-support

.. _changes_434:

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

Happy merging! 🤖

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This change is