Update dependency tox to v4

renovate[bot] · web-flow · commit 62cc58a763c3 · 2025-07-27T08:04:21.000Z
diff --git a/requirements.txt b/requirements.txt
@@ -281,7 +281,7 @@ tornado==6.4
     # via
     #   -r requirements.in
     #   livereload
-tox==3.28.0
+tox==4.28.3
     # via
     #   -r requirements.in
     #   tox-direct
