Bump flat-cache from 5.0.0 to 6.1.1

Bumps [flat-cache](https://github.com/jaredwray/cacheable/tree/HEAD/packages/flat-cache) from 5.0.0 to 6.1.1.
- [Release notes](https://github.com/jaredwray/cacheable/releases)
- [Commits](https://github.com/jaredwray/cacheable/commits/HEAD/packages/flat-cache)

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

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

package.json

@@ -33,7 +33,7 @@
     "chalk": "^5.0.0",
     "cosmiconfig": "^9.0.0",
     "decamelize": "^6.0.0",
-    "flat-cache": "^5.0.0",
+    "flat-cache": "^6.1.1",
     "glob": "^10.1.0",
     "global-agent": "^3.0.0",
     "got": "^13.0.0",