* Support package distribution tags (#4348)
* Remove redundand variable check in `getInstallPackage`
* Simplify react-scripts version using `--scripts-version=@tagname` notation
* Add dist-tag tests to e2e-installs
* Installs and adds sass loader task in webpack for dev environment.
* Uses Timer's branch of sass-loader without node-sass dependency.
* Adds method for handling SASS modules.
* Fixes extension of excluded files when looking for scss modules.
* Adds support for both .scss and .sass extensions.
* Uses ExtractTextPlugin with sass-loader to bundle styles for the production build.
* Bundles SASS modules for the production build.
* Uses the latest version of sass-loader.
* Adds function to create different rules for style loaders in dev environment.
* Abstracts style loaders to a common function to avoid repetition.
* Simplifies the common function that creates style loaders.
* Creates assets for testing SASS/SCSS support.
* Creates mock components and unit tests for SASS and SCSS with and without modules.
* Creates integration tests for SASS/SCSS support.
* Adds node-sass as a template dependency so sass-loader can be tested.
* Includes sass tests when test component is mounted.
* Fixes asserted module name for sass and scss modules tests.
* Removes tests against css imports in SCSS and SASS files.
* Updates sass-loader to v7.
* Uses getCSSModuleLocalIdent from react-dev-utils.
* Fixes tests to match the use of getCSSModuleLocalIdent.
* Improves readability of getStyleLoader function.
* Uses postcss after sass.
* Refactors dev config to simplify common function for style loaders.
* Refactors prod config to simplify common function for style loaders.
* Use importLoaders config according to css-loader docs.
* Revert to use ecma 5 in uglifyOptions
* remove explicit ecma version from uglifyOptions settings
The defaults are already what we want
* be explicit of where we use ecma: 8 and ecma: 5
* allow appSrc accepting an array
* fixture of finding all appSrcs logic
* update docs on ModuleScopePlugin accepts an array for appSrc
* minor typo fix in docs: change directory to directories.
* Add explicit dep on plugin-proposal-object-rest-spread to babel-preset-react-app
* Bump babel-related deps to beta.42
* Pass useBuiltIns directly to react-preset
