Fixed builds and flexibilize the graphql-core integration

Author: syrusakbary

.travis.yml

@@ -80,13 +80,13 @@ matrix:
   fast_finish: true
   include:
   - python: '2.7'
-    env: DJANGO_VERSION=1.6
+    env: TEST_TYPE=build DJANGO_VERSION=1.6
   - python: '2.7'
-    env: DJANGO_VERSION=1.7
+    env: TEST_TYPE=build DJANGO_VERSION=1.7
   - python: '2.7'
-    env: DJANGO_VERSION=1.8
+    env: TEST_TYPE=build DJANGO_VERSION=1.8
   - python: '2.7'
-    env: DJANGO_VERSION=1.9
+    env: TEST_TYPE=build DJANGO_VERSION=1.9
   - python: '2.7'
     env: TEST_TYPE=build_website
   - python: '2.7'

setup.py

@@ -55,7 +55,7 @@ def run_tests(self):
 
     install_requires=[
         'six>=1.10.0',
-        'graphql-core==0.4.9',
+        'graphql-core>=0.4.9',
         'graphql-relay==0.3.3',
     ],
     tests_require=[