fix: add .js extensions for ESM compatibility

- Add .js extensions to all imports in server.ts
- Fix module imports for logger and other utilities
- Bump version to 0.3.6

Author: vveerrgg

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nostr-websocket-utils",
-  "version": "0.3.4",
+  "version": "0.3.6",
   "description": "Robust WebSocket utilities for Nostr applications with automatic reconnection, channel-based messaging, and type-safe handlers. Features heartbeat monitoring, message queueing, and comprehensive error handling.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/core/server.ts

@@ -4,11 +4,11 @@
  */
 
 import { WebSocket, WebSocketServer } from 'ws';
-import { createLogger } from '../utils/logger';
-import { createRateLimiter } from '../utils/rate-limiter';
-import { NostrWSServerOptions, NostrWSServerSocket } from '../types/websocket';
-import { NostrWSMessage } from '../types/messages';
-import { RateLimiter } from '../utils/rate-limiter';
+import { createLogger } from '../utils/logger.js';
+import { createRateLimiter } from '../utils/rate-limiter.js';
+import { NostrWSServerOptions, NostrWSServerSocket } from '../types/websocket.js';
+import { NostrWSMessage } from '../types/messages.js';
+import { RateLimiter } from '../utils/rate-limiter.js';
 import { v4 as uuidv4 } from 'uuid';
 
 const logger = createLogger('NostrWSServer');