pass cssSourceMap option to vue-loader (#756)

Author: KagamiChan

template/build/vue-loader.conf.js

@@ -2,14 +2,17 @@
 const utils = require('./utils')
 const config = require('../config')
 const isProduction = process.env.NODE_ENV === 'production'
+const sourceMapEnabled = isProduction
+  ? config.build.productionSourceMap
+  : config.dev.cssSourceMap
+
 
 module.exports = {
   loaders: utils.cssLoaders({
-    sourceMap: isProduction
-      ? config.build.productionSourceMap
-      : config.dev.cssSourceMap,
+    sourceMap: sourceMapEnabled,
     extract: isProduction
   }),
+  cssSourceMap: sourceMapEnabled,
   transformToRequire: {
     video: 'src',
     source: 'src',