statsmodels.tsa.arima_model.ARIMA deprecated

[microprediction]

Hi,
I noticed divinity failing due to changed by TSA. It's a quick fix to the path.
Peter

aise NotImplementedError(ARIMA_DEPRECATION_ERROR)\nNotImplementedError: \nstatsmodels.tsa.arima_model.ARMA and statsmodels.tsa.arima_model.ARIMA have\nbeen removed in favor of statsmodels.tsa.arima.model.ARIMA