v3.6.2.0

New features

1. 'ostap/stats/moments.py` : suppress excessive warning messages from (scipy) xintegration  
1. some tweaks for canvas,styles,pads...
1. `histos.py`  : add function `histos_overlay` to draw superimposed histogram with different y-scales 
1. remove `IntegrationWarning` from ctest' `PYWARNINGS` (it tens to produce confusing reports)
1. `overlay` : pick up label font, size, color and offset from the frst left/right histogram 
1. `simfit` : complete the action, related to root-project/root#20383 and root-project/root#20618
1. `make_bkg` : improve the printout in case of extra/unused/ignored argumetns 
1. add `map2table_ex` function to `ostap.logger.utils` module 
1. tiny tweaks for reweighting
1. update `ds2numpy` : add `wname` argument to rename weight for strutured output 
1. `statvars.py` : issue the warning messages when weight uncertainties are defiend but ignored
1. add web-colors & imporve plotting functions 

Backward incompatible

1. change interface of `(GB)Reweighter` 

Bug fixes

1. `dataset.py`: fix `ds_slice`