Moves dependencies only required to development to devDependencies. Removes artifact dependencies. Updates some of them.
---
List of updated modules (to latest version):
```
babel-plugin-named-asset-import
camelcase
dotenv
lint-staged
prettier
sass-loader
css-loader
```
The previous issue with css-loader breaking npm start appears to have been resolved by the resolution of the React 16 conflict in earlier diffs and updates to other css dependencies.