Merge pull request #218 from kyhau/dependabot/pip/all-dependencies-182e9e2596

Update tox requirement from ~=4.18 to ~=4.20 in the all-dependencies group

Author: github-actions[bot]

requirements-build.txt

@@ -4,4 +4,4 @@ virtualenv~=20.26
 setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability
 logilab-common~=2.0
 m2r~=0.3
-tox~=4.18
+tox~=4.20