Update docs for Webpack 4?

[bcardarella]

The current docs callout Webpack 3 specifically. Is there anything different required in installation for webpack 4?

[Johann-S]

Nope, it works the same in Webpack 4, but we should update our docs thanks 👍

[crenshaw-dev]

Looks like the way Bootstrap handles modules has been changed and should be reflected instead of the docs.

There's no longer any need to use exports-loader to load modules individually.

eb81c39

[Johann-S]

We already removed the part about exports-loader @mac9416 see: https://getbootstrap.com/docs/4.1/getting-started/webpack/#importing-javascript

[XhmikosR]

@Johann-S: is this still valid?

[Johann-S]

Yep, I think at least we shouldn't specify a Webpack version, because we don't use custom things, it's a basic usage of Webpack

[XhmikosR]

All right, I will make a PR to remove the version reference.