Hi!

Great work on the project!
I was wondering iffyou will support ARIMA_PLUS_XREG since I can't seem to find it in the forecasting.py and I'm unsure if i can overwirte the model._bqml_model since the fit() for ARIMA_PLUS checks for more than 1 X column.

Is it possible to make a workaround or will your implement the ARIMA_PLUS_XREG in the near future?

Best,

Lukas