build(deps): bump nodemailer from 4.6.5 to 6.6.1

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 4.6.5 to 6.6.1.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v4.6.5...v6.6.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -31,7 +31,7 @@
     "morgan": "^1.9.1",
     "multer": "^1.3.0",
     "nocache": "^2.0.0",
-    "nodemailer": "^4.2.0",
+    "nodemailer": "^6.6.1",
     "outdatedbrowser": "^1.1.5",
     "passport": "^0.4.0",
     "passport-google-oauth": "^1.0.0",