Merge remote-tracking branch 'origin/feat/modernize-project' into feat/modernize-project

Author: surister

setup.py

@@ -73,7 +73,7 @@ def read(path):
             "stopit>=1.1.2,<2",
             "pytz",
             "zc.customdoctests>=1.0.1,<2",
-            "zope.testing>=4,<6",
+            "zope.testing>=4,<7",
             "zope.testrunner>=5,<8",
         ],
     },