change the cesium version

package.json

@@ -54,7 +54,7 @@
     "@turf/turf": "^6.3.0",
     "babel-eslint": "^10.0.1",
     "babel-loader": "^8.0.5",
-    "cesium": "^1.98.1",
+    "cesium": "1.98.1",
     "chalk": "^4.1.0",
     "copy-webpack-plugin": "^5.0.2",
     "css-loader": "^2.1.1",