build(deps-dev): bump watchdog from 1.0.2 to 2.1.1

Bumps [watchdog](https://github.com/gorakhargosh/watchdog) from 1.0.2 to 2.1.1.
- [Release notes](https://github.com/gorakhargosh/watchdog/releases)
- [Changelog](https://github.com/gorakhargosh/watchdog/blob/master/changelog.rst)
- [Commits](gorakhargosh/watchdog@v1.0.2...v2.1.1)

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