llc: prepare for release

Author: sachaarbonel

packages/stream_feed/lib/version.dart

@@ -1,3 +1,3 @@
 /// Current package version
 /// Used in [HttpClient] to build the `x-stream-client` header
-const String packageVersion = '0.4.0+3';
+const String packageVersion = '0.5.0';

packages/stream_feed/pubspec.yaml

@@ -1,6 +1,6 @@
 name: stream_feed
 description: Stream Feed official Dart SDK. Build your own feed experience using Dart and Flutter. 
-version: 0.4.0+3
+version: 0.5.0
 repository: https://github.com/GetStream/stream-feed-flutter
 issue_tracker: https://github.com/GetStream/stream-feed-flutter/issues
 homepage: https://getstream.io/