Request feature: please add html support

[amir14a]

Hi, I use this package for my text with simple html/css tags in string (like , color, ...)
Please add html support with RichText for your package.
I use this package for converting my html string to RichText: https://pub.dev/packages/simple_html_css
Thanks.

[NRijnberg]

@amir14a HTML support is added as we speak, there is an open PR right now and will be reviewed today.