Bump nodemailer from 6.4.2 to 6.4.16

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.4.2 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@v6.4.2...v6.4.16)

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

package.json

@@ -26,7 +26,7 @@
     "jsonwebtoken": "^8.5.1",
     "merge-graphql-schemas": "^1.7.6",
     "minecraft-protocol": "^1.10.0",
-    "nodemailer": "^6.4.2",
+    "nodemailer": "^6.4.16",
     "pg": "^7.17.1",
     "pg-hstore": "^2.3.3",
     "redis": "^2.8.0",