fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NODEMAILER-14157156

Author: snyk-bot

package-lock.json

@@ -53,7 +53,7 @@
     "lodash": "^4.17.21",
     "mocha": "^9.2.2",
     "morgan": "1.10.0",
-    "nodemailer": "^6.7.3",
+    "nodemailer": "^7.0.11",
     "nodemon": "2.0.16",
     "nunjucks": "^3.2.3",
     "pg": "^8.7.3",