chore: prepare for release.

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat_flutter/pubspec.yaml

@@ -1,7 +1,7 @@
 name: stream_chat_flutter
 homepage: https://github.com/GetStream/stream-chat-flutter
 description: Stream Chat official Flutter SDK. Build your own chat experience using Dart and Flutter.
-version: 6.7.0
+version: 7.0.0-beta.1
 repository: https://github.com/GetStream/stream-chat-flutter
 issue_tracker: https://github.com/GetStream/stream-chat-flutter/issues
 
@@ -38,7 +38,7 @@ dependencies:
   rxdart: ^0.27.7
   share_plus: ^7.0.2
   shimmer: ^3.0.0
-  stream_chat_flutter_core: ^6.6.0
+  stream_chat_flutter_core: ^7.0.0-beta.1
   synchronized: ^3.1.0
   thumblr: ^0.0.4
   url_launcher: ^6.1.12