title: how to set max_bin params in LightGBM
body: <p>Following code throws error saying "Unexpected keyword arguemnt 'max_bin'". Later I found <a href="https://github.com/Microsoft/LightGBM/issues/1100" rel="nofollow noreferrer">'max_bin' is depreciated</a>. So how can I pass max_bin using 'params'? Can anyone show me a piece of sample code?</p>
  
  <pre><code>lgb.Dataset(x_train, lable=y, max_bin=56)
  </code></pre>
  
  <blockquote>
    <p>/anaconda3/lib/python3.6/site-packages/lightgbm/basic.py:648: LGBMDeprecationWarning: The max_bin parameter is deprecated and will
    be removed in 2.0.12 version. Please use params to pass this
    parameter.
        'Please use params to pass this parameter.', LGBMDeprecationWarning)</p>
  </blockquote>