[react-markdown] react-markdown doesn't parse span tag

[johnzhu12]

I has a mark down string:

...
### <span id=\"5.2.1\">5.2.1 密钥管理</span>\n\n<span>我是测试文案啊</span>\n\n- 
...

it will be parsed to

<h3>&lt;span id="5.2.1"&gt;5.2.1 密钥管理&lt;/span&gt;</h3>
<p>&lt;span&gt;我是测试文案啊&lt;/span&gt;</p>

[johnzhu12]

skipHtml={true} will make this work ,but it will skip all html....

[wooorm]

https://github.com/remarkjs/react-markdown#appendix-a-html-in-markdown