build(deps-dev): bump @feathersjs/feathers from 5.0.20 to 5.0.21 (#100)

Bumps [@feathersjs/feathers](https://github.com/feathersjs/feathers/tree/HEAD/packages/feathers) from 5.0.20 to 5.0.21.
- [Release notes](https://github.com/feathersjs/feathers/releases)
- [Changelog](https://github.com/feathersjs/feathers/blob/dove/packages/feathers/CHANGELOG.md)
- [Commits](https://github.com/feathersjs/feathers/commits/v5.0.21/packages/feathers)

---
updated-dependencies:
- dependency-name: "@feathersjs/feathers"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -51,7 +51,7 @@
   "devDependencies": {
     "@feathersjs/adapter-tests": "5.0.20",
     "@feathersjs/express": "5.0.20",
-    "@feathersjs/feathers": "5.0.20",
+    "@feathersjs/feathers": "5.0.21",
     "@types/mocha": "^10.0.1",
     "@types/node": "^20.10.6",
     "@typescript-eslint/eslint-plugin": "^6.18.1",