* es2015 bundle with dependencies via npm script build🇪🇸bundle
* es2015 bundle without dependencies via npm script build🇪🇸bundle
* jest dependency for test:artifact
* migrate babel.config.json to babel.config.js and maintain env support for commonjs and es2015
* remove polyfill
* fix es syntax: replace module.exports with export
* fix es syntax: remove .jsx extension inside import

* .babelrc replacement ref: https://babeljs.io/docs/en/config-files