Any plans for css3 support?

[hesco]

My first attempt to use this tool generates a number of Invalid property warnings / errors.

I'm seeing this:

$ csstidy css/style.css /dev/null | grep Invalid | awk '{ print $6 }' | sort 
background-size
border-radius
border-radius
box-shadow
box-shadow
box-sizing
font-size-adjust
font-size-adjust
grid-gap
grid-template-columns
grid-template-columns
opacity
text-shadow
text-shadow

I suspect these may all be valid in css3 but not in css2.

Any plans to update the scope of this tool, perhaps with a switch so one can choose the version with which they wish to test for validity?