feat(setup.py): increase cubicweb max version to 3.34.x

cubicweb_varnish/__pkginfo__.py

@@ -14,7 +14,7 @@ description = 'cubicweb varnish helper'
 web = 'https://forge.extranet.logilab.fr/cubicweb/cubes/%s' % distname
 
 __depends__ = {
-    'cubicweb': ">= 3.31.0, < 3.33.0",
+    'cubicweb': ">= 3.31.0, < 3.35.0",
 }
 __recommends__ = {}