add support for flex properties

[Delapouite]

Hi

Some recently introduced CSS properties would be a nice additions to this plugin : flex-grow, justify-content, align-items…

[iansinnott]

I agree it would be nice if this worked out of the box, but these properties are still getting picked up as stylusProperty, which means you can manually link their syntax highlighting style. In your vimrc:

hi link stylusProperty cssVisualProp

You can also run this in a window and see the result. Worked for me to make flex properties highlight the same as everything else.

[talmobi]

@iansinnott works perfectly! Thanks!