Support of Dart Sass

[Athorcis]

Hello,

this PR adds an option named implementation to allow the selection of dart sass when using sass-extract@3.0.0

[boycce]

Are you able to provide a guide on how to use this PR?

[Athorcis]

@boycce
You just have to use the implementation option of the loader, one example could be :

import * as sass from 'sass';

webpackConfig.module.rules.push({
    test: /\.scss$/,
    resourceQuery: /[?&]extract-variables=true(&|$)/,
    loader: 'sass-extract-loader',
    enforce: 'pre',
    options: {
        // We have to pass a copy of the sass object
        // because the original is frozen and sass-extract
        // tries to modify it
        implementation: {...sass}
    }
    type: 'javascript/auto',
});