Update dependency nodemailer to v6.6.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nodemailer (source)	6.6.2 -> 6.6.3

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Release Notes

nodemailer/nodemailer

### [`v6.6.3`](https://togithub.com/nodemailer/nodemailer/blob/master/CHANGELOG.md#​663-2021-07-14) [Compare Source](https://togithub.com/nodemailer/nodemailer/compare/b75e539d71daa0b40248273e0e1d328c1e262bdd...v6.6.3) - Do not show passwords in SMTP transaction logs. All passwords used in logging are replaced by `"/* secret */"`

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