Migrate to structured logging

src/dictionary_quiz.rs

@@ -146,8 +146,8 @@ impl DictionaryQuizState {
         if !self.is_help {
             self.score.total += 1;
         }
-        if self.answer == self.correct
-            || split_with_coma(self.correct.as_str()).contains(&self.answer)
+        if self.answer.to_lowercase() == self.correct.to_lowercase()
+            || split_with_coma(self.correct.to_lowercase().as_str()).contains(&self.answer.to_lowercase())
         {
             if !self.is_help {
                 self.score.correct += 1;