Cap tox version

domdfcoding · domdfcoding · commit 896671c3aa31 · 2023-04-21T08:52:06.000+01:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,4 @@
 domdf-python-tools>=2.8.0
 first>=2.0.2
 pluggy>=0.13.1
-tox>=3.21.0
+tox<4,>=3.21.0
