chore: release v5.2.1

* (@Apollon77/@copilot) Add validation for JSON files in admin/ and admin/i18n/ directories
* (@Apollon77/@copilot) Logs npm and installation errors to console for easier debugging
* (@Apollon77/@copilot) Add validation to fail if iobroker.js-controller is listed as a package.json dependency
* (@Apollon77/@copilot) Add support for TypeScript-only adapters that use .ts files as main entry point without transpilation
* (@Apollon77/@copilot) Re-enabled validation checks for README.md and LICENSE files in packageFiles tests

Author: Apollon77

CHANGELOG.md

@@ -4,7 +4,7 @@
 	PLACEHOLDER for the next version:
 	## **WORK IN PROGRESS**
 -->
-## **WORK IN PROGRESS**
+## 5.2.1 (2025-11-08)
 * (@Apollon77/@copilot) Add validation for JSON files in admin/ and admin/i18n/ directories
 * (@Apollon77/@copilot) Logs npm and installation errors to console for easier debugging
 * (@Apollon77/@copilot) Add validation to fail if iobroker.js-controller is listed as a package.json dependency

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@iobroker/testing",
-  "version": "5.2.0",
+  "version": "5.2.1",
   "description": "Shared utilities for adapter and module testing in ioBroker",
   "main": "build/index.js",
   "types": "build/index.d.ts",