packaging: build artifacts as es6 and UMD module

[Hotell]

Current behavior

We will ship packages as compiled ES5 via commonjs module format

Expected behavior

Ship also raw es6 module compiled files for webpack 2 tree shaking consumption by user of any package.
Webpack support module package.json property for this.
And also UMD for non bundler users

This will also allow to consume our package for non wepback users