fix(types): removes MultiDrag and Swap exports from index

BREAKING CHANGE: it's apparent we're import sortablejs with all plugins mounted. We've had a few
bugs come in that MultiDrag no longer exports because of version 1.12.x of sortablejs making an
accidental breaking change.

fix #179

Author: waynevanson

src/index.ts

@@ -4,13 +4,11 @@ export {
   DOMRect,
   GroupOptions,
   MoveEvent,
-  MultiDrag,
   Options,
   PullResult,
   PutResult,
   SortableEvent,
   SortableOptions,
-  Swap,
   Utils,
 } from "sortablejs";
 export { ReactSortable } from "./react-sortable";