Bump flat-cache from 3.0.4 to 3.1.0

Bumps [flat-cache](https://github.com/jaredwray/flat-cache) from 3.0.4 to 3.1.0.
- [Changelog](https://github.com/jaredwray/flat-cache/blob/master/changelog.md)
- [Commits](https://github.com/jaredwray/flat-cache/commits)

---
updated-dependencies:
- dependency-name: flat-cache
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -15,7 +15,7 @@
     "express": "^4.18.2",
     "express-async-handler": "^1.2.0",
     "express-favicon-short-circuit": "^1.1.1",
-    "flat-cache": "^3.0.4",
+    "flat-cache": "^3.1.0",
     "helmet": "^7.0.0",
     "json-fetch-cache": "^1.2.6",
     "node-fetch": "^2.7.0",