ImageryLayer does not accept various ImageryProviders

[rot1024]

In Cesium.d.ts, some imagery providers do not satisfy ImageryProvider class type constrain.

const provider = new ArcGisMapServerImageryProvider({
  url: "//services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer",
});

const layer = new ImageryLayer(provider, { /* ... */ })
//                             ^^^^^^^^　Error!
// 'ArcGisMapServerImageryProvider' type is missing the following properties from type 'ImageryProvider': defaultNightAlpha, defaultDayAlpha ts(2739)

I confirmed ArcGisMapServerImageryProvider and IonImageryProvider are so, but perhaps there are other providers that is so.

[mramato]

Thanks @rot1024, this is already fixed in master and will go out with the 1.70.1 release later this week. See #8908 for the full details/changes if you're interested.

[rot1024]

Thank you for quick reply.