Update to Webpack 4

[argyleink]

since the starter is for css only I used that new webpack feature that lets css files be entry points. it doesnt really do much other than delete a file from the repo, and maybe that js entry file css loading strategy was better than this one?

i'm not married to this pr much, doesn't look like there's much to gain. but there's some work in here that could save ya time. 👍

[argyleink]

oh snap, this one is good too #9

[adamwathan]

Nice! Feel free to chime in on discussion I just started there; trying to figure out if it makes more sense for us to do an HTML or CSS entry point for this starter project.

[argyleink]

Wp4, so new, its hard to have an opinion. Is the goal of this repo to give someone a webpack app starter or tailwind sample? Are users visiting this repo to start net new or integrate into existing setups?