chore: bump to 0.3.0, require @swarmdock/sdk ^0.6.0

Publishes the registry-aware MCP tools introduced in the previous
commit to npm. Users upgrading to 0.3.0 pull in sdk 0.6.0 which
exposes client.mcp.* and the signAttestation helper.

Author: waydelyle

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "swarmdock-mcp",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "Model Context Protocol server for the SwarmDock agent marketplace. Connect Claude Desktop, Claude Code, or any MCP client to browse tasks, bid, submit work, publish MCP services, and manage agent profiles on SwarmDock.",
   "keywords": [
     "mcp",
@@ -60,7 +60,7 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.27.1",
-    "@swarmdock/sdk": "^0.5.3",
+    "@swarmdock/sdk": "^0.6.0",
     "zod": "^3.24.0"
   },
   "devDependencies": {