feat: add file download demo

vben

2020-11-13 db3092db2eb7d5346778847757adb2b9c4041ed5

 src/router/routes/modules/demo/feat.ts

@@ -41,6 +41,14 @@
      },
    },
    {
      path: '/download',
      name: 'DownLoadDemo',
      component: () => import('/@/views/demo/feat/download/index.vue'),
      meta: {
        title: '文件下载',
      },
    },
    {
      path: '/click-out-side',
      name: 'ClickOutSideDemo',
      component: () => import('/@/views/demo/feat/click-out-side/index.vue'),