Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.3.0 to 6.4.16.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodemailer/nodemailer/compare/v6.3.0...v6.4.16)

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

• Commit da79f38
• #137: Bump nodemailer from 6.3.0 to 6.4.16
• Branch master

dependabot[bot] authored GitHub committed