fix(mp-toutiao): app.json use component2 (question/156550)

packages/webpack-uni-pages-loader/lib/platforms/mp-toutiao/index.js

@@ -3,5 +3,8 @@ module.exports = function (pagesJson, manifestJson) {
     app,
     project
   } = require('../mp')(pagesJson, manifestJson, require('./project.config.json'))
+  const [key, value] = ['component2', true]
+  app.content = app.content || {}
+  app.content[key] = key in pagesJson ? pagesJson[key] : value
   return [app, project]
 }