Bump watchdog from 2.1.0 to 2.1.1

Bumps [watchdog](https://github.com/gorakhargosh/watchdog) from 2.1.0 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@v2.1.0...v2.1.1)

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

Author: dependabot-preview[bot]

requirements.txt

@@ -3,7 +3,7 @@ pymongo==3.11.4
 netaddr==0.8.0
 flask==1.1.2
 terminable_thread==0.7.1
-watchdog==2.1.0
+watchdog==2.1.1
 pyshark==0.4.3
 oschmod==0.3.12
 argparse==1.4.0