Merge pull request #1279 from VWS-Python/dependabot/pip/vulture-2.1

Bump vulture from 2.0 to 2.1

Author: adamtheturtle

dev-requirements.txt

@@ -28,5 +28,5 @@ sphinx-autodoc-typehints==1.11.0
 sphinxcontrib-spelling==5.3.0
 twine==3.2.0
 versioneer==0.18
-vulture==2.0
+vulture==2.1
 yapf==0.30.0  # Automatic formatting for Python