htmlToWord : base64 image  can't  load

hi , I hava  a problem  , when I use this package to deal  html to word ,  base64 image  can't  load ,

html code 
```html
<img src="data:image/png;base64,iVBORw0KGqKjG/>
```
python code

```python
pypandoc.convert_file(html_path_xpath, to='docx',format="html", outputfile=word_path)
```
