use common analysis options

packages/stream_chat/lib/src/api/channel.dart

@@ -646,7 +646,7 @@ class Channel {
       messageId: messageId,
       createdAt: now,
       type: type,
-      user: user!,
+      user: user,
       score: 1,
       extraData: extraData,
     );
@@ -654,7 +654,7 @@ class Channel {
     // Inserting at the 0th index as it's the latest reaction
     latestReactions.insert(0, newReaction);
     final ownReactions = [...latestReactions]
-      ..removeWhere((it) => it.userId != user.id);
+      ..removeWhere((it) => it.userId != user!.id);
 
     final newMessage = message.copyWith(
       reactionCounts: {...message.reactionCounts ?? <String, int>{}}

packages/stream_chat/lib/src/client.dart

@@ -1495,8 +1495,7 @@ class ClientState {
   Stream<OwnUser?> get userStream => _userController.stream;
 
   /// The current user
-  Map<String?, User?> get users =>
-      _usersController.value as Map<String?, User?>;
+  Map<String?, User?> get users => _usersController.value!;
 
   /// The current user as a stream
   Stream<Map<String?, User?>> get usersStream => _usersController.stream;

packages/stream_chat/lib/src/db/chat_persistence_client.dart

@@ -78,10 +78,15 @@ abstract class ChatPersistenceClient {
       getPinnedMessagesByCid(cid, messagePagination: pinnedMessagePagination),
     ]);
     return ChannelState(
+      // ignore: cast_nullable_to_non_nullable
       members: data[0] as List<Member>,
+      // ignore: cast_nullable_to_non_nullable
       read: data[1] as List<Read>,
+      // ignore: cast_nullable_to_non_nullable
       channel: data[2] as ChannelModel?,
+      // ignore: cast_nullable_to_non_nullable
       messages: data[3] as List<Message>,
+      // ignore: cast_nullable_to_non_nullable
       pinnedMessages: data[4] as List<Message>,
     );
   }

packages/stream_chat/lib/src/models/channel_model.dart

@@ -112,7 +112,7 @@ class ChannelModel {
 
   /// Shortcut for channel name
   String get name =>
-      extraData.containsKey('name') ? extraData['name'] as String : cid;
+      extraData.containsKey('name') ? extraData['name']! as String : cid;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => Serialization.moveFromExtraDataToRoot(

packages/stream_chat/lib/src/models/user.dart

@@ -83,7 +83,7 @@ class User {
   /// Shortcut for user name
   String get name {
     if (extraData.containsKey('name')) {
-      final name = extraData['name'] as String;
+      final name = extraData['name']! as String;
       if (name.isNotEmpty) return name;
     }
     return id;