Upgrade webpack to version 4.

[fristonio]

Origami as of now works on webpack version 3.10 but webpack 4 has been released which has a lot of improvements over webpack3 including less build time and better plugin architecture.
Take a look at Webpack4 what's new

Upgrading the version will improve performance and will make builds faster.

[himanshuc3]

Hi. As I can see currently in webpack.base.config.js, the only thing it is doing is bundling from the entry point index.js. One thing that could be changed is definitely the CommonsChunkPlugin. I would first make that commit see if there is some preformance change also, I would suggest to make a build-utils folder instead of littering the top level folder with these build utilities.

[ghost]

Hi, i would like to work on this.

[ghost]

#286