upgrade the cesium

examples/index.html

 
 <div class="container">
   <div class="nav">
-    <div class="banner"> DC-SDK v3.1.0 </div>
+    <div class="banner"> DC-SDK v3.2.0 </div>
     <div class="example-list-wrapper">
       <div id="example-list" class="example-list" data-accordion-group> </div>
       <div class="desc"></div>

package.json

     "@babel/plugin-proposal-class-properties": "^7.18.6",
     "@babel/plugin-transform-runtime": "^7.21.4",
     "@babel/preset-env": "^7.21.5",
-    "@cesium/engine": "^4.0.0",
+    "@cesium/engine": "^6.1.1",
     "@rollup/plugin-babel": "^6.0.3",
     "@rollup/plugin-commonjs": "^24.1.0",
     "@rollup/plugin-node-resolve": "^15.0.2",