markdown-it渲染bug，涉及tree及脚注

[vincenteliang]

Releases 2.7.0-beta.0

Q1、在页面中使用以下markdown-it语法时会出现奇妙错误
::: tree

• title
  :::

Q2、footnote脚注样式未生效

Q3、图片CDN路径未生效

环境：
macOS 10.15.3 (19D76)
hexo 4.2.0
markdown-it 10.0.0
markdown-it-container 2.0.0

[jason19970210-senao]

footnote syntax is not working for me.

something [^1] after something

[^1]: the footnote of something

Output should be:
something ¹ after something

---

Or
it should render like this: https://blog.oniuo.com/post/inside-theme-showcase#footnote

Footnotes

1. the footnote of something ↩