Bump nodemailer from 6.4.8 to 6.6.0

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.4.8 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/v6.4.8...v6.6.0)

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "crontab-ui",
-  "version": "0.3.9",
+  "version": "0.3.13",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -475,9 +475,9 @@
       "integrity": "sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw=="
     },
     "nodemailer": {
-      "version": "6.4.8",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.8.tgz",
-      "integrity": "sha512-UbJD0+g5e2H20bWv7Rpj3B+N3TMMJ0MLoLwaGVJ0k3Vo8upq0UltwHJ5BJfrpST1vFa91JQ8cf7cICK5DSIo1Q=="
+      "version": "6.6.0",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.6.0.tgz",
+      "integrity": "sha512-ikSMDU1nZqpo2WUPE0wTTw/NGGImTkwpJKDIFPZT+YvvR9Sj+ze5wzu95JHkBMglQLoG2ITxU21WukCC/XsFkg=="
     },
     "object-keys": {
       "version": "1.1.1",