Merge pull request #49 from Anselmoo/dependabot/pip/packaging-21.0

Bump packaging from 20.9 to 21.0

Author: Anselmoo

dev-requirements.txt

@@ -16,7 +16,7 @@ iniconfig==1.1.1
 isort==5.7.0
 mccabe==0.6.1
 mypy-extensions==0.4.3
-packaging==20.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+packaging==21.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 pathspec==0.8.1
 pluggy==0.13.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 py==1.10.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'