bump default negatiated version

Author: KKonstantinov

src/types.ts

@@ -2,7 +2,7 @@ import * as z from 'zod/v4';
 import { AuthInfo } from './server/auth/types.js';
 
 export const LATEST_PROTOCOL_VERSION = '2025-11-25';
-export const DEFAULT_NEGOTIATED_PROTOCOL_VERSION = '2025-03-26';
+export const DEFAULT_NEGOTIATED_PROTOCOL_VERSION = '2025-06-18';
 export const SUPPORTED_PROTOCOL_VERSIONS = [LATEST_PROTOCOL_VERSION, '2025-06-18', '2025-03-26', '2024-11-05', '2024-10-07'];
 
 export const RELATED_TASK_META_KEY = 'io.modelcontextprotocol/related-task';