Update dependency node-red-node-email to v1.18.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
node-red-node-email (source)	1.15.1 -> 1.18.4

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Release Notes

node-red/node-red-nodes (node-red-node-email)

### [`v1.18.4`](https://togithub.com/node-red/node-red-nodes/compare/bb0a6fd272c44233200440fb04c3146c656aa45d...9bae313b722147b00480ce2e26ed0aab357b836b) [Compare Source](https://togithub.com/node-red/node-red-nodes/compare/bb0a6fd272c44233200440fb04c3146c656aa45d...9bae313b722147b00480ce2e26ed0aab357b836b) ### [`v1.18.3`](https://togithub.com/node-red/node-red-nodes/compare/c3a5716fe76c24e349b59a800f79de39b87998a3...bb0a6fd272c44233200440fb04c3146c656aa45d) [Compare Source](https://togithub.com/node-red/node-red-nodes/compare/c3a5716fe76c24e349b59a800f79de39b87998a3...bb0a6fd272c44233200440fb04c3146c656aa45d) ### [`v1.18.2`](https://togithub.com/node-red/node-red-nodes/compare/06c9bd65a7583eb7292d8cd05c6f73cfafe75eed...c3a5716fe76c24e349b59a800f79de39b87998a3) [Compare Source](https://togithub.com/node-red/node-red-nodes/compare/06c9bd65a7583eb7292d8cd05c6f73cfafe75eed...c3a5716fe76c24e349b59a800f79de39b87998a3) ### [`v1.18.1`](https://togithub.com/node-red/node-red-nodes/compare/584590b9a609aecf4bfc09b8978865d51e59d101...06c9bd65a7583eb7292d8cd05c6f73cfafe75eed) [Compare Source](https://togithub.com/node-red/node-red-nodes/compare/584590b9a609aecf4bfc09b8978865d51e59d101...06c9bd65a7583eb7292d8cd05c6f73cfafe75eed)

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Configuration

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