fix: correct server version to 0.2.0 (minor bump from 0.1.4)

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Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@xtr-dev/rondevu-server",
-  "version": "2.0.0",
+  "version": "0.2.0",
   "description": "DNS-like WebRTC signaling server with username claiming and service discovery",
   "main": "dist/index.js",
   "scripts": {