chore: bump version to 0.3.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mizchi

package.json

@@ -1,6 +1,6 @@
 {
   "name": "bit-relay",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "private": true,
   "type": "module",
   "scripts": {