add interpolate-size: allow-keywords;

[jojojojojoj5564656465465]

link of new proprety

[jojojojojoj5564656465465]

/* Keywords */
interpolate-size: allow-keywords;
interpolate-size: numeric-only;

/* Global values */
interpolate-size: inherit;
interpolate-size: initial;
interpolate-size: revert;
interpolate-size: revert-layer;
interpolate-size: unset;