Remove Webpack plugins from development dependencies to simplify the `package.json` file

[joaopalmeiro]

Hi! 👋

Problem

This is not exactly a problem, but I would like to suggest a small change to the package.json file to simplify it.

Currently, there are three Webpack plugins as development dependencies: css-loader, source-map-loader, and style-loader. They are all @jupyterlab/builder dependencies, so they are installed together. Therefore, to simplify the package.json file a bit (and consequently the template), especially for new extension developers, I think it would be good to remove them.

Proposed Solution

Delete the css-loader, source-map-loader, and style-loader development dependencies from the following file:

extension-template/template/package.json.jinja

Line 67 in eda2e0d

"devDependencies": {

Please let me know your opinion and if I can help/open a PR.

Thanks!

[fcollonval]

@joaopalmeiro does yarn complain when installing the dependencies if those are removed? If not, feel free to open a PR.

[jtpio]

If I recall correctly, these devDependencies were added in jupyterlab/extension-cookiecutter-ts#293, mostly because of pnpm? There is some prior discussion about this here: jupyterlab/extension-cookiecutter-ts#293 (comment)

Also thinking it would be great to remove them, especially to simplify the template a bit and not have extension authors wonder what these devDependencies are used for.