Update watchdog to 2.1.5

[pyup-bot]

This PR updates watchdog from 2.1.3 to 2.1.5.

Changelog

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/

[pyup-bot]

Closing this in favor of #290