Bump convict from 6.2.1 to 6.2.4 (#26)

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

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "body-parser": "^1.19.1",
-    "convict": "^6.2.1",
+    "convict": "^6.2.4",
     "cookie-parser": "^1.4.6",
     "debug": "^4.3.3",
     "dotenv": "^16.0.0",