Merge pull request #15 from WindomZ/greenkeeper/graphql-0.13.0

Update graphql to the latest version 🚀

Author: WindomZ

package.json

@@ -23,7 +23,7 @@
   "dependencies": {
     "express": "^4.15.3",
     "express-graphql": "^0.6.6",
-    "graphql": "^0.12.0",
+    "graphql": "^0.13.0",
     "lodash": "^4.17.4"
   },
   "devDependencies": {