------------------
- Use a callback to fine tune the configuration at javascript helper.
[rodfersou]
- Review to add Sprite plugin just if necessary.
[rodfersou]
- Review to add SCSS files just if necessary.
[rodfersou]
- Use script async by default.
[rodfersou]
- Fix library definition to work with Plone 5.
[thet, rodfersou]
- Emit current package version in package.json configuration (closes `40 <https://github.com/simplesconsultoria/sc.recipe.staticresources/issues/40>`_).
[rodfersou]