Update version

version

+20200129-2050.03
+if there is 'index.html', then do not show file but show the html.
+如果有index.html，就不显示文件列表了，直接显示html内容。
+
 20200120.02
 fix domain_path do not work. domain_path正常工作了。
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 20200118.01
 Can be deploy to heroku/SCF/normal space. SCF、heroku、普通VPS，三种环境都可以用了。
 Change imgup_path to guestup_path, plz make sure it after update. 将imgup_path改成guestup_path更符合用途，更新后请注意更改。