Enable sass-loader

package.json

@@ -22,7 +22,9 @@
     "babel-preset-stage-2": "^6.24.1",
     "css-loader": "^0.28.4",
     "eslint": "^4.4.1",
+    "node-sass": "^4.5.3",
     "rimraf": "^2.6.1",
+    "sass-loader": "^6.0.6",
     "style-loader": "^0.18.2",
     "webpack": "^3.5.5",
     "webpack-node-externals": "^1.6.0"

webpack.config.js

 const path = require('path')
 const nodeExternals = require('webpack-node-externals')
 
+const include = [
+  path.join(__dirname, 'src'),
+  /xpub-[^/]+\/src/,
+]
+
 module.exports = {
   entry: './src/index.js',
   output: {
@@ -21,10 +26,7 @@ module.exports = {
           // ES6 modules
           {
             test: /\.js$/,
-            include: [
-              path.join(__dirname, 'src'),
-              /xpub-[^/]+\/src/,
-            ],
+            include,
             loader: 'babel-loader',
             options: {
               presets: [
@@ -39,10 +41,7 @@ module.exports = {
           // CSS modules
           {
             test: /\.local\.css$/,
-            include: [
-              path.join(__dirname, 'src'),
-              /xpub-[^/]+\/src/,
-            ],
+            include,
             use: [
               'style-loader',
               {
@@ -52,6 +51,23 @@ module.exports = {
                 }
               }
             ],
+          },
+
+          // SCSS modules
+          {
+            test: /\.local\.scss$/,
+            include,
+            use: [
+              'style-loader',
+              {
+                loader: 'css-loader',
+                options: {
+                  modules: true,
+                  importLoaders: 1
+                }
+              },
+              'sass-loader'
+            ],
           }
         ]
       }