Updated CHANGELOG

Author: martinmitrevski

CHANGELOG.md

@@ -4,4 +4,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 # Upcoming
 
-### 🔄 Changed
+### ✅ Added
+
+First alpha version of the iOS Feeds SDK, with the following features:
+- Create different types of feeds and feed groups
+- Personalization of feeds
+- Post activities with attachments (images, video, polls, etc)
+- Comments and threaded comments
+- Reactions, bookmarks, reposts
+- Follows and requests to follow
+- and much more.
+
+For more details on the supported features, please check our [docs](https://getstream.io/activity-feeds/docs/ios/).