Updated version to 1.3.1

Author: syrusakbary

Diff for: setup.py

@@ -1,10 +1,10 @@
 from setuptools import setup, find_packages
 
-required_packages = ['graphql-core>=0.5.0', 'flask>=0.7.0']
+required_packages = ['graphql-core>=1.0', 'flask>=0.7.0']
 
 setup(
     name='Flask-GraphQL',
-    version='1.2.0',
+    version='1.3.1',
     description='Adds GraphQL support to your Flask application',
     long_description=open('README.rst').read(),
     url='https://github.com/graphql-python/flask-graphql',

Diff for: tox.ini

@@ -8,7 +8,7 @@ setenv =
 deps =
     pytest>=2.7.2
     pytest-flask>=0.10.0
-    graphql-core>=0.5.0
+    graphql-core>=1.0
     Flask>=0.10.0
     pytest-cov
 commands =
@@ -24,7 +24,7 @@ commands =
 basepython=python3.5
 deps =
     isort
-    graphql-core>=0.5.0
+    graphql-core>=1.0
     Flask>=0.10.0
 commands =
     isort --check-only flask_graphql/ -rc