Log Message:
Update to 0.28

Upstream changes:
0.28 2023-08-07
    * Restore Perl 5.8 compatibility

0.27 2023-08-06
    * Allow for more whitespace in An+B formulae and in parentheses
    * Support :nth-child(n-3) to select the first three elements
    * Fix handling of :nth-of-type to actually respect the type