chore: prepare for release.

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

packages/stream_chat_persistence/pubspec.yaml

@@ -1,7 +1,7 @@
 name: stream_chat_persistence
 homepage: https://github.com/GetStream/stream-chat-flutter
 description: Official Stream Chat Persistence library. Build your own chat experience using Dart and Flutter.
-version: 6.6.0
+version: 7.0.0-beta.1
 repository: https://github.com/GetStream/stream-chat-flutter
 issue_tracker: https://github.com/GetStream/stream-chat-flutter/issues
 
@@ -18,7 +18,7 @@ dependencies:
   path: ^1.8.3
   path_provider: ^2.0.15
   sqlite3_flutter_libs: ^0.5.15
-  stream_chat: ^6.6.0
+  stream_chat: ^7.0.0-beta.1
 
 dev_dependencies:
   build_runner: ^2.4.6