Date Scalar only added in graphene 2.0.1

= · = · commit c952ef1a880e · 2017-12-18T12:21:49.000-05:00
diff --git a/setup.py b/setup.py
@@ -57,7 +57,7 @@
 
     install_requires=[
         'six>=1.10.0',
-        'graphene>=2.0,<3',
+        'graphene>=2.0.1,<3',
         'Django>=1.8.0',
         'iso8601',
         'singledispatch>=3.4.0.3',
