remove global.Node matches polyfill

[NoMaillard]

matches is not a method on a Node only on an Element

[rahim]

It would be great to see this merged - I've just hit exactly this issue, where a third party script (from VWO) has been throwing errors because it assumes matches would be defined on Element, but not Node (or Document which is a descendant) matching the DOM specs:

• https://developer.mozilla.org/en-US/docs/Web/API/Element/matches
• https://dom.spec.whatwg.org/#dom-element-matches

smooth-dnd itself uses matches only once (here) and the TypeScript implies it's only ever used on Element so the change should be safe.