Typing for IonImageryProvider.fromAssetId is incorrect

[angrycat9000]

options is marked as required but is actually optional.

Docs do not indicate optional

cesium/packages/engine/Source/Scene/IonImageryProvider.js

Line 254 in 003922b

* @param {IonImageryProvider.ConstructorOptions} options Object describing initialization options.

default value set in the function however

cesium/packages/engine/Source/Scene/IonImageryProvider.js

Line 269 in 003922b

options = defaultValue(options, defaultValue.EMPTY_OBJECT);

This causes Typescript to indicate an error if options is not provided