Migrate from node-sass to dart-sass

[JoshRobertson]

Has there been any discussion about migrating from node-sass to dart-sass?

Dart-sass is now the primary implementation of sass, and Webpack itself recommends dart-sass:
https://webpack.js.org/loaders/sass-loader/

[oshanz]

This is really important.

1. python2 is now on EOL. node-sass doesn't support python 3. Python 3 support by bumping node-gyp to 6.1.0 sass/node-sass#2936
2. node-sass has plan to make it deprecate. Mark Node Sass as deprecated sass/node-sass#2952

[justin808]

Is there any way to monkey patch the child dependency?

[tegandbiscuits]

Just wanted to say that #2716 should resolve this.

I'm not sure when it'll actually go out to NPM, but I was able to just replace @rails/webpacker with the github repo.

[dreyks]

now that libsass (and hence node-sass) is deprecated maybe we should cut another 5.x release with this change?

[Pezmc]

How do we go about cutting a new 5.x release, there are a few things now waiting to go out!

[pedrofurtado]

We can follow the progress on this PR 🤝 : #2914