v0.15.1

Yes! New Release! Bugs have been squashed!!!

To upgrade: yarn upgrade

Changes: v0.15.0..v0.15.1

Documentation: http://symfony.com/doc/current/frontend.html

Highlights:

• Fixed bug with using ? in your versioning strategy with
  addStyleEntry - #161 via @Lyrkan

• Fixed bug when using webpack.config.babel.js with ES6
  imports - #167 via @Lyrkan