revert: 回滚财新旧版 API(#5703)

lib/routes/caixin/article.js

@@ -3,7 +3,11 @@ const got = require('@/utils/got');
 module.exports = async (ctx) => {
     const response = await got({
         method: 'get',
-        url: 'https://mappsv5.caixin.com/index_page_v5/index_page_1.json',
+        url: 'http://mapiv5.caixin.com//m/api/getWapIndexListByPage?page=1&callback=&_=1560140003179',
+        headers: {
+            Referer: `http://mapiv5.caixin.com/`,
+            Host: 'mapiv5.caixin.com',
+        },
     });
 
     const data = response.data.data.list;