wander555 issues

Results 4 issues of


                                            wander555

一直是白色。。。。

![image](https://user-images.githubusercontent.com/6134211/108653231-e48fa100-7500-11eb-81e5-e75d536c0f2b.png)

换了最新的0.22不行，换了stable 0.21也不支持，请问最高支持到多少？

I know it used editor.js,but is any possibility to support markdown?