Updated version to 1.2.0

Author: syrusakbary

setup.py

@@ -4,7 +4,7 @@
 
 setup(
     name='Flask-GraphQL',
-    version='1.1.0',
+    version='1.2.0',
     description='Adds GraphQL support to your Flask application',
     long_description=open('README.rst').read(),
     url='https://github.com/graphql-python/flask-graphql',

tox.ini

@@ -8,7 +8,7 @@ setenv =
 deps =
     pytest>=2.7.2
     pytest-flask>=0.10.0
-    https://github.com/graphql-python/graphql-core/archive/master.zip
+    graphql-core>=0.5.0
     Flask>=0.10.0
     pytest-cov
 commands =
@@ -24,7 +24,7 @@ commands =
 basepython=python3.5
 deps =
     isort
-    https://github.com/graphql-python/graphql-core/archive/master.zip
+    graphql-core>=0.5.0
     Flask>=0.10.0
 commands =
     isort --check-only flask_graphql/ -rc