fix unharmonic candle pair

Author: 1cedsoda

lib/src/utils.dart

@@ -9,15 +9,15 @@ const defaultCandleGroups = [
   [Duration(milliseconds: 250), Duration(seconds: 1)],
   [Duration(seconds: 1), Duration(seconds: 5)],
   [Duration(seconds: 2), Duration(seconds: 10)],
-  [Duration(seconds: 3), Duration(seconds: 20)],
+  [Duration(seconds: 4), Duration(seconds: 20)],
   [Duration(seconds: 5), Duration(seconds: 30)],
   [Duration(seconds: 10), Duration(seconds: 60)],
   [Duration(seconds: 20), Duration(seconds: 120)],
   [Duration(seconds: 30), Duration(seconds: 180)],
   [Duration(seconds: 40), Duration(seconds: 240)],
   [Duration(minutes: 1), Duration(minutes: 5)],
   [Duration(minutes: 2), Duration(minutes: 10)],
-  [Duration(minutes: 3), Duration(minutes: 15)],
+  [Duration(minutes: 4), Duration(minutes: 20)],
   [Duration(minutes: 5), Duration(minutes: 30)],
   [Duration(minutes: 10), Duration(minutes: 60)],
   [Duration(minutes: 20), Duration(minutes: 120)],