added fill type to line in options object and to radar dataset options (#9284)
added fill type to line in options object and to radar dataset options (#9284)


chartjs/Chart.js,chartjs/Chart.js,touletan/Chart.js,chartjs/Chart.js,touletan/Chart.js,chartjs/Chart.js,touletan/Chart.js,touletan/Chart.js,nnnick/Chart.js