update pubspec with published v0.4.0 of llc

Author: sachaarbonel

packages/stream_feed_flutter_core/pubspec.yaml

@@ -1,9 +1,9 @@
 name: stream_feed_flutter_core
-description: Stream Feed official Flutter SDK Core. Build your own chat experience using Dart and Flutter.
-version: 0.0.0
+description: Stream Feed official Flutter SDK Core. Build your own feed experience using Dart and Flutter.
+version: 0.4.0
+repository: https://github.com/GetStream/stream-feed-flutter
+issue_tracker: https://github.com/GetStream/stream-feed-flutter/issues
 homepage: https://getstream.io/
-publish_to: none
-
 environment:
   sdk: '>=2.14.0 <3.0.0'
   flutter: ">=1.17.0"
@@ -12,8 +12,7 @@ dependencies:
   flutter:
     sdk: flutter
   rxdart: ^0.27.1
-  stream_feed:
-    path: ../stream_feed
+  stream_feed: ^0.4.0
 
 dev_dependencies:
   flutter_test: