fix devtool

Author: lian-yue

webpack.config.js

@@ -59,11 +59,11 @@ module.exports = {
     historyApiFallback: true,
     noInfo: true
   },
-  devtool: '#eval-source-map'
+  devtool: 'eval-source-map'
 }
 
 if (process.env.NODE_ENV === 'production') {
-  module.exports.devtool = '#source-map'
+  module.exports.devtool = 'source-map'
   // http://vuejs.github.io/vue-loader/workflow/production.html
   module.exports.plugins = (module.exports.plugins || []).concat([
     new webpack.DefinePlugin({