Fix lint job

Author: Diego

lib/WebpackConfig.js

@@ -116,13 +116,7 @@ class WebpackConfig {
         this.copyFilesConfigs = [];
         this.sassOptions = {
             resolveUrlLoader: true,
-            resolveUrlLoaderOptions: {
-                engine: 'postcss',
-                keepQuery: false,
-                removeCR: false,
-                debug: false,
-                silent: false
-            }
+            resolveUrlLoaderOptions: {}
         };
         this.preactOptions = {
             preactCompat: false

lib/loaders/sass.js

@@ -30,10 +30,12 @@ module.exports = {
             // entry file, not the file that contains the url()
             sassLoaders.push({
                 loader: 'resolve-url-loader',
-                options: {
-                    sourceMap: webpackConfig.useSourceMaps,
-                    ...webpackConfig.sassOptions.resolveUrlLoaderOptions
-                }
+                options: Object.assign(
+                    {
+                        sourceMap: webpackConfig.useSourceMaps
+                    },
+                    webpackConfig.sassOptions.resolveUrlLoaderOptions
+                )
             });
         }