fix build errors

babel.config.js

@@ -1,7 +1,11 @@
-{
+module.exports = function (api) {
+  api.cache(true);
+
+  return {
     "presets": ["@babel/preset-typescript"],
     "plugins": [
         ["@babel/plugin-transform-runtime"]
     ],
     "sourceType": "unambiguous"
-} 
+  };
+}