Install required six

pombredanne · pombredanne · commit a6cd72b6e744 · 2022-05-09T14:48:19.000+02:00
Signed-off-by: Philippe Ombredanne &lt;pombredanne@nexb.com&gt;
diff --git a/setup.cfg b/setup.cfg
@@ -74,7 +74,7 @@ install_requires =
     commoncode >= 30.2.0
     plugincode >= 21.1.21
     typecode >= 21.6.1
-
+    six
 
 [options.packages.find]
 where = src
