build(deps): bump nodemailer from 6.4.11 to 6.4.16

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.4.11 to 6.4.16.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.4.11...v6.4.16)

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

Author: dependabot[bot]

package.json

@@ -52,7 +52,7 @@
     "mailgun-js": "0.22.0",
     "mustache": "4.0.1",
     "node-pg-migrate": "5.5.0",
-    "nodemailer": "6.4.11",
+    "nodemailer": "6.4.16",
     "pg": "8.3.3",
     "redis": "3.0.2",
     "uuid": "8.3.0",

yarn.lock

@@ -8148,10 +8148,10 @@ node-releases@^1.1.53:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.58.tgz#8ee20eef30fa60e52755fcc0942def5a734fe935"
   integrity sha512-NxBudgVKiRh/2aPWMgPR7bPTX0VPmGx5QBwCtdHitnqFE5/O8DeBXuIMH1nwNnw/aMo6AjOrpsHzfY3UbUJ7yg==
 
-nodemailer@6.4.11:
-  version "6.4.11"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.4.11.tgz#1f00b4ffd106403f17c03f3d43d5945b2677046c"
-  integrity sha512-BVZBDi+aJV4O38rxsUh164Dk1NCqgh6Cm0rQSb9SK/DHGll/DrCMnycVDD7msJgZCnmVa8ASo8EZzR7jsgTukQ==
+nodemailer@6.4.16:
+  version "6.4.16"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.4.16.tgz#5cb6391b1d79ab7eff32d6f9f48366b5a7117293"
+  integrity sha512-68K0LgZ6hmZ7PVmwL78gzNdjpj5viqBdFqKrTtr9bZbJYj6BRj5W6WGkxXrEnUl3Co3CBXi3CZBUlpV/foGnOQ==
 
 nodemon@2.0.4:
   version "2.0.4"