Bump express from 4.18.2 to 4.19.2 in /app (#47)

Bumps [express](https://github.com/expressjs/express) from 4.18.2 to 4.19.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.18.2...4.19.2)

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

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

Author: dependabot[bot]

app/package-lock.json

@@ -19,7 +19,7 @@
     "@ibm-cloud/cloudant": "^0.8.0",
     "dotenv": "^16.3.0",
     "async": "^3.2.4",
-    "express": "^4.18.2",
+    "express": "^4.19.2",
     "express-session": "1.17.3",
     "formidable": "^2.1.1",
     "ibm-cos-sdk": "^1.13.1",