Bump nodemailer from 4.4.0 to 6.4.10

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 4.4.0 to 6.4.10.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v4.4.0...v6.4.10)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -20,7 +20,7 @@
     "formidable": "^1.2.2",
     "moment": "^2.27.0",
     "mysql": "^2.18.1",
-    "nodemailer": "^4.7.0",
+    "nodemailer": "^6.4.10",
     "nodemailer-smtp-transport": "^2.7.4",
     "q": "^1.5.1",
     "sharp": "^0.25.4",