Update watchdog to 2.1.6

[pyup-bot]

This PR updates watchdog from 2.1.3 to 2.1.6.

Changelog

### 2.1.6 ``` ~~~~~ 2021-10-01 • `full history <https://github.com/gorakhargosh/watchdog/compare/v2.1.5...v2.1.6>`__ - [bsd] Fixed returned paths in ``kqueue.py`` and restored the overall results of the test suite. (`842 <https://github.com/gorakhargosh/watchdog/pull/842>`_) - [bsd] Updated FreeBSD CI support .(`841 <https://github.com/gorakhargosh/watchdog/pull/841>`_) - [watchmedo] Removed the ``argh`` dependency in favor of the builtin ``argparse`` module. (`836 <https://github.com/gorakhargosh/watchdog/pull/836>`_) - [watchmedo] Removed unexistant ``WindowsApiAsyncObserver`` references and ``--debug-force-winapi-async`` arguments. - [watchmedo] Improved the help output. - Thanks to our beloved contributors: knobix, AndreaRe9, BoboTiG ``` ### 2.1.5 ``` ~~~~~ 2021-08-23 • `full history <https://github.com/gorakhargosh/watchdog/compare/v2.1.4...v2.1.5>`__ - Fix regression introduced in 2.1.4 (reverted "Allow overriding or adding custom event handlers to event dispatch map. (`814 <https://github.com/gorakhargosh/watchdog/pull/814>`_)"). (`#830 <https://github.com/gorakhargosh/watchdog/pull/830>`_) - Convert regexes of type ``str`` to ``list``. (`831 <https://github.com/gorakhargosh/watchdog/pull/831>`_) - Thanks to our beloved contributors: unique1o1, BoboTiG ``` ### 2.1.4 ``` ~~~~~ 2021-08-19 • `full history <https://github.com/gorakhargosh/watchdog/compare/v2.1.3...v2.1.4>`__ - [watchmedo] Fix usage of ``os.setsid()`` and ``os.killpg()`` Unix-only functions. (`809 <https://github.com/gorakhargosh/watchdog/pull/809>`_) - [mac] Fix missing ``FileModifiedEvent`` on permission or ownership changes of a file. (`815 <https://github.com/gorakhargosh/watchdog/pull/815>`_) - [mac] Convert absolute watch path in ``FSEeventsEmitter`` with ``os.path.realpath()``. (`822 <https://github.com/gorakhargosh/watchdog/pull/822>`_) - Fix a possible ``AttributeError`` in ``SkipRepeatsQueue._put()``. (`818 <https://github.com/gorakhargosh/watchdog/pull/818>`_) - Allow overriding or adding custom event handlers to event dispatch map. (`814 <https://github.com/gorakhargosh/watchdog/pull/814>`_) - Fix tests on big endian platforms. (`828 <https://github.com/gorakhargosh/watchdog/pull/828>`_) - Thanks to our beloved contributors: replabrobin, BoboTiG, SamSchott, AndreiB97, NiklasRosenstein, ikokollari, mgorny ```

Links

- PyPI: https://pypi.org/project/watchdog - Changelog: https://pyup.io/changelogs/watchdog/ - Repo: https://github.com/gorakhargosh/watchdog - Docs: https://pythonhosted.org/watchdog/