fixing momnet security issue

Author: lirown

package.json

@@ -1,6 +1,6 @@
 {
   "name": "graphql-custom-directives",
-  "version": "0.2.8",
+  "version": "0.2.9",
   "description": "Create custom graphql directives with the ability to hook the execution of graphql",
   "main": "dist/index.js",
   "scripts": {
@@ -33,7 +33,7 @@
   },
   "homepage": "https://github.com/lirown/graphql-custom-directives#readme",
   "dependencies": {
-    "moment": "^2.17.10",
+    "moment": "^2.22.2",
     "numeral": "^2.0.6",
     "lodash": "^4.17.5"
   },