add enum column

[sahifedp]

please add enum columns to handle more than two status in grid view
I use trntv/EnumColumn for now :
https://github.com/yii2-starter-kit/yii2-starter-kit/blob/master/common/grid/EnumColumn.php
with this syntax:

 [
     'class' => \common\grid\EnumColumn::className(),
     'attribute' => 'status',
     'enum' => [ 
             '0' => 'unknown',
             'F' => 'Female',
            'M' => 'Male',
     ]
 ]

but it is good that kartik/grid has ownself.
thanks