Update coverage to 4.4.2

[pyup-bot]

There's a new version of coverage available.
You are currently using 4.4.1. I have updated it to 4.4.2

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

Changelog

4.4.2

---

• Support for Python 3.7. In some cases, class and module docstrings are no
  longer counted in statement totals, which could slightly change your total
  results.

• Specifying both --source and --include no longer silently ignores the
  include setting, instead it displays a warning. Thanks, Loïc Dachary. Closes
  issue 265_ and issue 101_.

• Fixed a race condition when saving data and multiple threads are tracing
  (issue 581_). It could produce a "dictionary changed size during iteration"
  RuntimeError. I believe this mostly but not entirely fixes the race
  condition. A true fix would likely be too expensive. Thanks, Peter Baughman
  for the debugging, and Olivier Grisel for the fix with tests.

• Configuration values which are file paths will now apply tilde-expansion,
  closing issue 589_.

• Now secondary config files like tox.ini and setup.cfg can be specified
  explicitly, and prefixed sections like [coverage:run] will be read. Fixes
  issue 588_.

• Be more flexible about the command name displayed by help, fixing
  issue 600_. Thanks, Ben Finney.

.. _issue 101: https://bitbucket.org/ned/coveragepy/issues/101/settings-under-report-affect-running
.. _issue 581: https://bitbucket.org/ned/coveragepy/issues/581/race-condition-when-saving-data-under
.. _issue 588: https://bitbucket.org/ned/coveragepy/issues/588/using-rcfile-path-to-toxini-uses-run
.. _issue 589: https://bitbucket.org/ned/coveragepy/issues/589/allow-expansion-in-coveragerc
.. _issue 600: https://bitbucket.org/ned/coveragepy/issues/600/get-program-name-from-command-line-when

.. _changes_441:

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

Happy merging! 🤖