Upgrade cesium to 1.97

custom-webpack.config.js

@@ -4,9 +4,12 @@ module.exports = {
       // Resolve node module use of fs
       fs: "empty",
       Buffer: false,
-      http: "empty",
-      https: "empty",
-      zlib: "empty"
+      http: require.resolve("stream-http"),
+      https: require.resolve("https-browserify"),
+      url: require.resolve("url/"),
+      zlib: require.resolve('browserify-zlib'),
+      assert: require.resolve("assert/"),
+      util: require.resolve("util/")
     }
   }
 };