chore(ui): bump jiffy to v6.2.1

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

packages/stream_chat_flutter/lib/src/user/user_item.dart

@@ -14,6 +14,7 @@ import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 /// [StreamChatTheme].
 /// Modify it to change the widget's appearance.
 /// {@endtemplate}
+@Deprecated('Use `StreamUserListTile` instead.')
 class StreamUserItem extends StatelessWidget {
   /// {@macro streamUserItem}
   const StreamUserItem({
@@ -73,11 +74,12 @@ class StreamUserItem extends StatelessWidget {
 
   Widget _buildLastActive(BuildContext context) {
     final chatTheme = StreamChatTheme.of(context);
+    final lastActive = user.lastActive ?? DateTime.now();
     return Text(
       user.online
           ? context.translations.userOnlineText
           : '${context.translations.userLastOnlineText} '
-              '${Jiffy(user.lastActive).fromNow()}',
+              '${Jiffy.parseFromDateTime(lastActive).fromNow()}',
       style: chatTheme.textTheme.footnote.copyWith(
         color: chatTheme.colorTheme.textHighEmphasis.withOpacity(0.5),
       ),