reverted wrong commot. no dependency to iso8601 is needed

palmkevin · palmkevin · commit 8b2fea5078ee · 2016-11-21T07:59:17.000+01:00
diff --git a/setup.py b/setup.py
@@ -36,6 +36,7 @@
         'graphene>=1.0',
         'SQLAlchemy',
         'singledispatch>=3.4.0.3',
+        'iso8601',
     ],
     tests_require=[
         'pytest>=2.7.2',
