v0.5.3

Changelog

82ee017 BUG：群组和频道收到表情文件引发OPML导入错误 (#28)
6c8cc8c BroadNews use text template
45576ba Merge pull request #24 from yichya/fix-xml-parsing-and-magic-number
584a79b Merge pull request #26 from boypt/prevlen
2900b75 check admin on receiving doc
7c095d7 docs(readme): update readme
ee4d9a4 feat(bot): custom bot api endpoint
4df2d82 feat(set): inline button
f70c1cb feat(unsub): format unsub message
47dfe73 feat(unsub): inline button
220ce81 feat(unsub): inline button in group
6c6c169 feat: set command for channel
d2b2771 filter files .opml
6b23c26 fix UpdateFeed xml parsing; fix ErrorCount magic number
ee354e3 fix misuse of sub.EnableTelegraph
f503cea fix tpl_mode too verbose
74417e7 fix xml parsing
42228e8 fix xml parsing (#23)
b3b728f fix(import): remove doc mime type limit
ab5c5c3 fix: markdown mode is strict on source codes
385b358 only publish to telegraph if html len > config.PreviewText
541cfd9 print bad msg
e6cbb30 修BUG：Markdown模板的错误可能导致telegram api报错 (#27)
643d178 增加可配置的消息模板 (#25)