chore(repo): add lints, update freezed, json_serializable

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

packages/stream_chat_flutter/lib/src/gallery_footer.dart

@@ -20,7 +20,7 @@ class StreamGalleryFooter extends StatefulWidget
     implements PreferredSizeWidget {
   /// Creates a StreamGalleryFooter
   const StreamGalleryFooter({
-    Key? key,
+    super.key,
     this.onBackPressed,
     this.onTitleTap,
     this.onImageTap,
@@ -29,8 +29,7 @@ class StreamGalleryFooter extends StatefulWidget
     required this.mediaAttachmentPackages,
     this.mediaSelectedCallBack,
     this.backgroundColor,
-  })  : preferredSize = const Size.fromHeight(kToolbarHeight),
-        super(key: key);
+  })  : preferredSize = const Size.fromHeight(kToolbarHeight);
 
   /// Callback to call when pressing the back button.
   /// By default it calls [Navigator.pop]