fix securtiy issues with lodash and moment

Author: lirown

package.json

@@ -33,7 +33,7 @@
   },
   "homepage": "https://github.com/lirown/graphql-custom-directives#readme",
   "dependencies": {
-    "moment": "^2.15.1",
+    "moment": "^2.17.10",
     "numeral": "^2.0.6",
     "lodash": "^4.17.5"
   },