Skia is missing from renderer type

[RafaelCENG]

I had to add my self the renderer type of skia inside echarts types

declare type RendererType = 'canvas' | 'svg' | 'skia';

Also maybe a good improvement is to consider using correct types and avoid any? For example these parts here.

  const skiaRef = useRef<any>(null)
    let chart: any