Create-react-app: Documentation tells to install dev dependencies as dependencies

[klzns]

Is this a bug report?

No.

I would like to know why the docs points to install dev dependencies as dependencies.

For example, it tells to install gh-pages, source-map-explorer, enzyme, react-test-renderer, jest-enzyme with npm install --save instead of npm install --save-dev.

The change was made in this PR:
https://github.com/facebookincubator/create-react-app/pull/2660

Example:

[gaearon]

Please see my response in https://stackoverflow.com/questions/44868453/create-react-app-install-devdepencies-in-dependencies-section/44872787#44872787.