- added `RollingStat` abstract class for indicators which require computing stat on a rolling window. - added `Max` and `Min` using `RollingStat` - changed `SMA` and `SD` to use `RollingStat`
0.1.0
- added `SD` and `BBands`. - using dequeue instead of list in `SMA`, `EMA`. - added `compute` in `WMA`, `SMMA`. - added type annotations.