feat(aria): support scatter, and effectScatter; use maxDataCnt when generating description
feat(aria): support scatter, and effectScatter; use maxDataCnt when generating description

apache/incubator-echarts,ecomfe/echarts,100star/echarts,ecomfe/echarts,chenfwind/echarts,apache/incubator-echarts,100star/echarts,chenfwind/echarts