babel config change (opensearch-project#229)

Signed-off-by: sumukhswamy <[email protected]>

Author: sumukhswamy

babel.config.js

@@ -8,5 +8,5 @@
 // Alternative to install them locally in node_modules
 module.exports = {
   presets: [require("@babel/preset-env"), require("@babel/preset-react"), require("@babel/preset-typescript")],
-  plugins: [require("@babel/plugin-proposal-class-properties"), require("@babel/plugin-proposal-object-rest-spread"), ["@babel/transform-runtime"]]
+  plugins: [require("@babel/plugin-transform-logical-assignment-operators"), ["@babel/transform-runtime"]]
 };