refs #19478 - update wrong webpack-dev-server dependency
Also, update sass-loader to avoid an npm warning:
```warning "sass-loader@4.1.1" has incorrect peer dependency"webpack@^2 || ^2.2.0-rc.0 || ^2.1.0-beta || ^1.12.6".```
Added by Ohad Levy almost 7 years ago
refs #19478 - update wrong webpack-dev-server dependency
Also, update sass-loader to avoid an npm warning:
```
warning "sass-loader@4.1.1" has incorrect peer dependency
"webpack@^2 || ^2.2.0-rc.0 || ^2.1.0-beta || ^1.12.6".
```