feat(build): es2015 bundle artifact (#6291)

* es2015 bundle with dependencies via npm script build:es:bundle
* es2015 bundle without dependencies via npm script build:es: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

.gitignore

@@ -11,9 +11,12 @@ selenium-debug.log
 chromedriver.log
 test/e2e/db.json
 docs/_book
-dist/log*
 
+# dist
 flavors/**/dist/*
+/lib
+/es
+dist/log*
 
 # Cypress
 test/e2e-cypress/screenshots