KNIME Analytics Platform - 4.6.0 Preview

@carstenhaubold I have tried a few things with the new Python integration and standard models and graphics seem to work quite well.

- h2o # there is obviously a knime implementation but for some advanced things it might be nice to have it
- xgboost
- lightgbm
- auto-sklearn
- autoxgb
- pycaret # no deep experience 

- featuretools          # feature generator  
- miceforest            # Missing value replacement

- prophet # time series analysis

 - openpyxl            # Excel Reader

- arrow
- orc

Question would be which ones should feature in a standard Python environment since experience unsers could always use a custom environment. Also I understood that there will be some development where you could build nodes based on Python - this might be a way to integrate specific packages (or would they use a central python environment?). Looking forward to this.

Another idea could be to also fully integrate a R version (though the variety of packages might be even larger). The Conda Environment propagation allows for the (well) propagation of a R version via conda/Miniconda - for Windows there are the R Windows Binaries - but maybe this could be a way for other operating systems too.

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