Bump @iobroker/testing from 2.5.3 to 2.5.4

Bumps [@iobroker/testing](https://github.com/AlCalzone/testing) from 2.5.3 to 2.5.4.
- [Release notes](https://github.com/AlCalzone/testing/releases)
- [Changelog](https://github.com/ioBroker/testing/blob/master/CHANGELOG.md)
- [Commits](ioBroker/testing@v2.5.3...v2.5.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -36,7 +36,7 @@
   },
   "devDependencies": {
     "@alcalzone/release-script": "^3.5.2",
-    "@iobroker/testing": "^2.5.3",
+    "@iobroker/testing": "^2.5.4",
     "@types/chai": "^4.3.0",
     "@types/chai-as-promised": "^7.1.4",
     "@types/gulp": "^4.0.9",