chore(deps): bump mailparser from 3.6.6 to 3.6.7 (#6503)

Bumps [mailparser](https://github.com/nodemailer/mailparser) from 3.6.6 to 3.6.7.
- [Release notes](https://github.com/nodemailer/mailparser/releases)
- [Changelog](https://github.com/nodemailer/mailparser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodemailer/mailparser/compare/v3.6.6...v3.6.7)

---
updated-dependencies:
- dependency-name: mailparser
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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package.json

@@ -136,7 +136,7 @@
     "koa-sslify": "5.0.1",
     "koa-useragent": "^4.1.0",
     "lodash": "^4.17.21",
-    "mailparser": "^3.6.6",
+    "mailparser": "^3.6.7",
     "mammoth": "^1.6.0",
     "markdown-it": "^13.0.1",
     "markdown-it-container": "^3.0.0",