However, the markdown in README from github doesn't seem to be rendered correctly. It looks fine on both Github and NPM, but the tables are displayed as raw markdown in Flow library.
Have anyone experienced this issue? Or does anyone have any pointers as to what might be wrong?
I guess that the library markdown interpreter does not support tables (which are a non-standard extension, or perhaps just a recent addition, not sure). As for whether there is anything that can be done about it, that will have to wait for an authoritative response.
And don't forget that some markdown interpreters are stricter than others about markup. One that often catches people out is lack of blank lines between headings and lists, etc.
I found a couple of other nodes using that syntax (e.g. huemagic) and as far as I know it's valid Github markdown syntax for centering content in table cells. But I can see what happen if I remove it