Bump furl from 2.0.0 to 2.1.0 in /cvat/requirements (#1786)

Bumps [furl](https://github.com/gruns/furl) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/gruns/furl/releases)
- [Changelog](https://github.com/gruns/furl/blob/master/changelog.txt)
- [Commits](https://github.com/gruns/furl/compare/v2.0.0...v2.1.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

cvat/requirements/base.txt

@@ -44,7 +44,7 @@ opencv-python==4.1.0.25
 h5py==2.10.0
 imgaug==0.4.0
 django-cors-headers==3.4.0
-furl==2.0.0
+furl==2.1.0
 av==6.2.0
 # The package is used by pyunpack as a command line tool to support multiple
 # archives. Don't use as a python module because it has GPL license.