Bump nodemailer from 6.8.0 to 6.9.9

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.8.0 to 6.9.9.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.8.0...v6.9.9)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-type: direct:production
...

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

package.json

@@ -50,7 +50,7 @@
     "mongoose": "^5.13.15",
     "nestjs": "^0.0.1",
     "network-list": "^1.1.5",
-    "nodemailer": "^6.7.8",
+    "nodemailer": "^6.9.9",
     "nth-check": ">=2.1.1",
     "passport": "^0.6.0",
     "passport-jwt": "^4.0.0",