fix(setup): keep rdflib-jsonld at version < 0.6.0

since 0.6.0 and above are tombstoning release
see: https://pypi.org/project/rdflib-jsonld/0.6.0/

--HG--
branch : 3.31

setup.py

@@ -74,8 +74,8 @@ setup(
         'Markdown',
         'markdown-urlize',
         'filelock',
-        'rdflib >= 5.0.0, < 6.0.0',
-        'rdflib-jsonld >= 0.6.1',
+        'rdflib < 6.0.0',
+        'rdflib-jsonld >= 0.5.0, < 6.0.0',
         'pyramid >= 1.5.0, < 2.0.0',
         'waitress >= 1.4.0, < 2.0.0',
         'wsgicors >= 0.3',