mse needs updating (to friedman_mse?)

[worthy7]

scikit-optimize/skopt/learning/forest.py

Line 197 in a2369dd

def __init__(self, n_estimators=10, criterion='mse', max_depth=None,

It seems this function no longer works with the latest sklearn because mse no longer exists

[ldillard-avantus]

I'm having the same issue. I believe the correct criterion value would now be "squared_error". Note that it would also need to be changed in the predict function on line 438 of the same file.

I have patched this locally with just these two lines changed (197 and 438 of forest.py), and it works.

Thanks!