chore: prepare for release.

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

packages/stream_chat/lib/version.dart

@@ -3,4 +3,4 @@ import 'package:stream_chat/src/client/client.dart';
 /// Current package version
 /// Used in [StreamChatClient] to build the `x-stream-client` header
 // ignore: constant_identifier_names
-const PACKAGE_VERSION = '6.6.0';
+const PACKAGE_VERSION = '7.0.0-beta.1';

packages/stream_chat/pubspec.yaml

@@ -1,7 +1,7 @@
 name: stream_chat
 homepage: https://getstream.io/
 description: The official Dart client for Stream Chat, a service for building chat applications.
-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