Set animation shorthand order to match spec

[Siilwyn]

Co-authored-by: Adrien Crivelli adrien.crivelli@gmail.com

[PowerKiKi]

I would add my original test, just to make sure it works and won't be broken in the future. Otherwise LGTM.

  {
    message: 'Sort alphabetically with a defined order.',
    fixture: 'a{animation: 3s linear 1s slide-in;animation-timeline: view();}',
    expected: 'a{animation: 3s linear 1s slide-in;animation-timeline: view();}',
    options: { order: 'concentric-css' },
  },