Update flutter

lib/models/kanji_entry.dart

@@ -25,7 +25,7 @@ class WordConstruct {
       : pieces = (json is String)
             ? [WordPiece(word: json, isActive: true)]
             : [for (final j in json as List) WordPiece.fromJson(j)];
-  
+
   @override
   String toString() {
     return pieces.map((p) => p.isActive ? p.word : '(${p.word})').join('');