upgrade graphql to 0.4.7

Author: mickhansen

package.json

@@ -34,7 +34,7 @@
     "chai": "^3.0.0",
     "chai-as-promised": "^5.1.0",
     "eslint": "^0.24.1",
-    "graphql": "^0.4.2",
+    "graphql": "^0.4.7",
     "istanbul": "^0.3.17",
     "mocha": "^2.2.5",
     "sequelize": "^3.7.0",