Fix Tile count not updating when Reaction row is updated

(maybe we should pass a randomValueKey when instancing instead?)

Author: nicolasbraun

packages/flyer_chat_reactions/lib/src/widgets/reaction_tile.dart

@@ -99,6 +99,16 @@ class _ReactionTileState extends State<ReactionTile> {
     _isTapped = widget.reactedByUser;
   }
 
+  @override
+  void didUpdateWidget(ReactionTile oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.count != widget.count) {
+      setState(() {
+        _count = widget.count;
+      });
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     // Used to shrink on state update