chore: bump version to 2.1.0

New features since 2.0.4:
- Reddit link posts and first comment media support
- Binary toLowerCase crash fix
- Analytics endpoints (total impressions, post analytics, platform metrics)
- Title optional for platforms that don't require it
- Link preview support for LinkedIn and Bluesky
- Queue maxPostsPerSlot option
- Tracking source header
- LinkedIn first_comment support
- getJobStatus method
- Google Business Profile location selection
- Topic tag support

Author: root

package.json

@@ -1,6 +1,6 @@
 {
   "name": "upload-post",
-  "version": "2.0.4",
+  "version": "2.1.0",
   "description": "Official client library for Upload-Post API - Cross-platform social media upload for TikTok, Instagram, YouTube, LinkedIn, Facebook, Pinterest, Threads, Reddit, Bluesky, and X (Twitter)",
   "main": "index.js",
   "types": "index.d.ts",