Merge pull request #5009 from kubasienki/patch-1

Update LedgerType.java with kraken type REWARD

Author: timmolter

xchange-kraken/src/main/java/org/knowm/xchange/kraken/dto/account/LedgerType.java

@@ -26,6 +26,7 @@ public enum LedgerType {
   ADJUSTMENT,
   SALE,
   SPEND,
+  REWARD,
   RECEIVE;
 
   private static final Map<String, LedgerType> fromString = new HashMap<>();