change the base layer

examples/vector/polyline_flicker.html

     viewer.addBaseLayer( baseLayer,{
       brightness : 0.1
     })
-    viewer.addBaseLayer( baseLayer)
     let layer = new DC.VectorLayer('layer')
     viewer.addLayer(layer)
 

package.json

 {
   "name": "@dvgis/dc-sdk",
-  "version": "4.0.0",
+  "version": "4.2.0",
   "license": "MIT",
   "description": "The SDK is based on Cesium for secondary development of 2, 3D all-in-one WebGis application framework, the framework optimizes the use of Cesium and add some additional features, designed for developers to quickly build WebGis applications.",
   "repository": "https://github.com/dvgis/dc-sdk.git",
     "dist"
   ],
   "dependencies": {
-    "@dvgis/dc-common": "^4.0.2"
+    "@dvgis/dc-common": "^4.2.0"
   }
 }

src/modules/exts/BaseLayerPicker.js

       id: `imagery-no-${this._count}`,
       layers: imageryLayers,
       cache: [],
+      options,
     })
     return this
   }