Merge pull request x-cold#107 from LetTTGACO/img2cos-master

feat(图床): 图片替换支持腾讯云图床、阿里云图床、七牛云图床

chore: compatibility with older yuque client (without token)

chore: remove loading pkg tips

Change-Id: I518e93a2e4c922feb5e5267876cee94d3da61a2d

Merge pull request x-cold#18 from Ghostdar/master

fix: front matter 语雀编辑器设置多个属性解析错误, 增加文档关于配置文章信息的指引

style: code

Change-Id: Id071921a9da55cc825acb61bc902312a69bc2721