如果使用的非常老的主题，在使用新版hugo的时候会出现首页空白的问题
有两种解决方案：
- 切换hugo到老版本（省事）
修改主题首页模版使用 Site.RegularPages
{{ $pages := .Pages }} {{ if .IsHome }} {{ $pages = .Site.RegularPages }} {{ end }} {{ $paginator := .Paginate $pages }}
主要原因是 v.0.58.0 的破坏性更新：
Hugo v.0.58.0 was released on the 4th of September 2019 and the breaking changes to the home.Pages collection that were reverted in 0.57.2 have been re-introduced Theme authors need to issue the fixes described above if they wish to keep their themes listed in the Hugo Showcase.