build(deps): bump nodemailer and @types/nodemailer

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) and [@types/nodemailer](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/nodemailer). These dependencies needed to be updated together.

Updates `nodemailer` from 6.4.11 to 6.9.8
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.4.11...v6.9.8)

Updates `@types/nodemailer` from 6.4.0 to 6.4.14
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/nodemailer)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-type: direct:production
- dependency-name: "@types/nodemailer"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -151,7 +151,7 @@
     "@types/koa": "2.11.4",
     "@types/koa-router": "7.4.1",
     "@types/node-fetch": "2.5.7",
-    "@types/nodemailer": "6.4.0",
+    "@types/nodemailer": "6.4.14",
     "@types/nodemailer-mailgun-transport": "1.4.1",
     "@types/react-helmet": "6.1.0",
     "@types/react-outside-click-handler": "1.3.0",
@@ -192,7 +192,7 @@
     "launchdarkly-react-client-sdk": "2.21.0",
     "mongoose": "5.10.18",
     "nanoid-base58": "0.1.0",
-    "nodemailer": "6.4.11",
+    "nodemailer": "6.9.8",
     "nodemailer-mailgun-transport": "2.0.0",
     "onefx": "2.6.8",
     "onefx-auth": "2.6.9",