Bump watchdog from 0.10.2 to 2.0.0

Bumps [watchdog](https://github.com/gorakhargosh/watchdog) from 0.10.2 to 2.0.0.
- [Release notes](https://github.com/gorakhargosh/watchdog/releases)
- [Changelog](https://github.com/gorakhargosh/watchdog/blob/master/changelog.rst)
- [Commits](gorakhargosh/watchdog@v0.10.2...v2.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -1,4 +1,4 @@
 python-dev-tools==2020.2.5
-watchdog==0.10.2
+watchdog==2.0.0
 flake8==3.7.9
 pyserial==3.4