Bump nodemailer from 6.4.14 to 6.4.16

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.4.14 to 6.4.16.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.4.14...v6.4.16)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "fhirpath": "2.1.5",
     "lodash": "^4.17.19",
     "moment": "^2.26.0",
-    "nodemailer": "^6.4.14",
+    "nodemailer": "^6.4.16",
     "sha.js": "^2.4.9",
     "winston": "^3.2.1"
   },