This may seem unnecessary (and odd to import CSS files into JS...), but
this sets up the project for being able to keep the distributed
(release) resources all together, as well as setting the stage for
introducing something like SCSS.
The bundled output is noticeably different; likely due to Webpack 4
vs. 2/3. The order of dependencies also appears to have changed.
The overall output *seems* to be the same. Unsure how to full test
that everything is getting bundled appropriately.
This also allows the project to be built without having to manually
copy files into node_modules.
