Bump nodemailer from 6.5.0 to 6.6.0
Bump nodemailer from 6.5.0 to 6.6.0

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.5.0 to 6.6.0.
- [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/v6.5.0...v6.6.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
w3c/echidna,w3c/echidna,w3c/echidna