Merge branch 'fix.avoid-graphene2' into 'master'

fix(setup): explicitely set Graphene deps to 1.x versions

See merge request !3

setup.py

@@ -29,7 +29,9 @@ setup(
         'flask-marshmallow>=0.7,<0.8',
         'flask-script>=2.0,<3',
         'flask-sqlalchemy>=2.1,<3',
+        'graphene>=1.0,<2',
         'graphene_sqlalchemy>=1.0,<2',
+        'graphql-core>=1.0,<2',
         'html5lib>=0.9999999,<1',
         'humanize>=0.5,<1',
         'ijson>=2.3,<3',