fix: package.json to reduce vulnerabilities (#1782)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:ms:20170412

Latest report for meanjs/mean:
https://snyk.io/test/github/meanjs/mean

package.json

@@ -54,7 +54,7 @@
     "lusca": "~1.4.1",
     "method-override": "~2.3.8",
     "mocha": "~3.2.0",
-    "mongoose": "~4.9.3",
+    "mongoose": "~4.10.2",
     "morgan": "~1.8.1",
     "multer": "~1.3.0",
     "nodemailer": "~2.6.4",