* Changes to mutiple classes
Fixed types of PolygonGraphics
- the type of fill property should be boolean
- the types in constructor's options object should match the types of the class properties
Fixed types of LabelGraphics
- the font property is a string specifying the CSS font
- see change notes to PolygonGraphics
Fixed types of EllipseGraphics
- the outlineColor prop is of type Color, not Property
- see change notes to PolygonGraphics
* Fixed types of LabelGraphics
- fillColor type changed to Color
- outlineColor type changed to Color
- outlineWidth type changed to number
* Fixed types in EllipseGraphics
* Updated PolygonGraphics
material property accepts both MaterialProperty and Color types
* Updated types in EllipseGraphics
* Fix typing error in PolygonGraphics
The property outlineColor of PolygonGraphics can accept both Property and Color types.
[Discussion on AnalyticalGraphicsInc/cesium](https://github.com/AnalyticalGraphicsInc/cesium/issues/6831)
* Update version
* Removed the Color type from outlineColor typedef.
