Bump convict from 6.2.1 to 6.2.4 (#24)

Bumps [convict](https://github.com/mozilla/node-convict) from 6.2.1 to 6.2.4.
- [Release notes](https://github.com/mozilla/node-convict/releases)
- [Changelog](https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mozilla/node-convict/commits)

---
updated-dependencies:
- dependency-name: convict
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -22,7 +22,7 @@
     "@hapi/inert": "^6.0.5",
     "@hapi/vision": "^6.1.0",
     "bunyan": "^1.4.0",
-    "convict": "^6.2.1",
+    "convict": "^6.2.4",
     "crypto-js": "^4.1.1",
     "debug": "^4.3.3",
     "handlebars": "^4.7.7",