Spiderchart with static scale

I am trying to configure a scatterpolar chart widget to use a static yScale. The scale is now adapting to the minimum and maximum value of the data. But I would like to use a static scale from 0 to 5. What am I doing wrong? The widget is not listening to the yScale keyword. [   {     "type": "scatterpolar",     "r": [       1,       4,       3,       2,       3,       2     ],     "theta": [       "A",       "B",       "C",       "D",       "E",       "F"     ],     "fill": "toself",     "fillcolor": "#709BFF",     "line": {       "color": "black"     },     "yScale": {       "minimum": 0,       "maximum": 5     }   } ]