海报：完善小程序码获取和海报生成

sheep/platform/provider/wechat/miniProgram.js

@@ -1,4 +1,4 @@
-// import third from '@/sheep/api/third';
+import third from '@/sheep/api/migration/third'
 import AuthUtil from '@/sheep/api/member/auth';
 import SocialApi from '@/sheep/api/member/social';
 import UserApi from '@/sheep/api/member/user';