fix issue LeaVerou#234, event.target.closest might not be defined whe…

…n dragging text

src/events/delegate.js

@@ -3,7 +3,7 @@ import bind from "./bind.js";
 
 function delegate (subject, type, selector, callback) {
  bind(subject, type, function(evt) {
- if (evt.target.closest(selector)) {
+ if ((evt.target.closest ? evt.target : evt.target.parentNode).closest(selector)) {
  callback.call(subject, evt);
  }
  });