fix: upgrade moment from 2.15.1 to 2.30.1

Snyk has created this PR to upgrade moment from 2.15.1 to 2.30.1.

See this package in npm:
https://www.npmjs.com/package/moment

See this project in Snyk:
https://app.au.snyk.io/org/millerorg/project/a6154133-29af-471d-bf31-785dba2c9c20?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -34,7 +34,7 @@
     "lodash": "4.17.20",
     "marked": "0.3.6",
     "method-override": "latest",
-    "moment": "2.15.1",
+    "moment": "2.30.1",
     "mongodb": "^3.5.9",
     "mongoose": "4.2.4",
     "morgan": "latest",