fix(qiankun): runtime routes not loaded correctly

[shushushv]

plugin-layout 和 plugin-qiankun 一起使用时，微应用配置的运行时路由没有被正确的添加到 layout 的 routes 中。

umi 自动生成的路由：

export function getRoutes() {
  const routes = [
  {
    "path": "/",
    "component": require('yourProject/src/.umi/plugin-setting-drawer/SettingDrawer.tsx').default,
    "routes": [
      {
        "path": "/",
        "component": require('yourProject/src/.umi/plugin-layout/Layout.tsx').default,
        "routes": [
          {
            "path": "/",
            "component": require('@/layouts/index').default,
            "routes": [
              {
                "path": "/home",
                "component": require('@/pages/home').default,
                "exact": true
              }
            ]
          }
        ]
      }
    ]
  }
];

src/app.ts 中添加的 qiankun 配置：

export const qiankun = fetch('/config').then(({ apps }) => {
  return {
    apps,
    routes: [
      {
        path: '/app1',
        microApp: 'app1',
      }    
    ]
  }
});

[codecov]

Codecov Report

Merging #541 (9486b1b) into master (d931276) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #541   +/-   ##
=======================================
  Coverage   47.60%   47.60%           
=======================================
  Files          66       66           
  Lines        1542     1542           
  Branches      424      424           
=======================================
  Hits          734      734           
  Misses        807      807           
  Partials        1        1           

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