fix(ui): yarn link @vue/ui

Author: Guillaume Chau

packages/@vue/cli-ui/vue.config.js

@@ -1,7 +1,25 @@
+const merge = require('deepmerge')
+const path = require('path')
+
 module.exports = {
   pluginOptions: {
     graphqlMock: false,
     apolloEngine: false,
     graphqlTimeout: 1000000
+  },
+  configureWebpack: {
+    resolve: {
+      symlinks: false
+    }
+  },
+  chainWebpack: config => {
+    config.module.rule('stylus').oneOf('vue').use('postcss-loader')
+      .tap(options =>
+        merge(options, {
+          config: {
+            path: path.resolve(__dirname, '.postcssrc')
+          }
+        })
+      )
   }
 }