Added the retinaTiles option to the OpenStreetMapImageryProvider constructor...

Added the retinaTiles option to the OpenStreetMapImageryProvider constructor options to allow requesting tiles at the 2x resolution for retina displays.

cesiumjs4gwt-main/src/main/java/org/cesiumjs/cs/scene/providers/options/OpenStreetMapImageryProviderOptions.java

@@ -39,6 +39,12 @@ public class OpenStreetMapImageryProviderOptions {
      */
     @JsProperty
     public String fileExtension;
+    /**
+     * When true, request tiles at the 2x resolution for retina displays.
+     * Default: false
+     */
+    @JsProperty
+    public boolean retinaTiles;
     // TODO: Proxy
     // /**
     // * A proxy to use for requests. This object is expected to have a getURL