Adding "originalEvent" to "close" trigger args (#6079)

src/js/select2/results.js

@@ -461,7 +461,10 @@ define([
             data: data
           });
         } else {
-          self.trigger('close', {});
+          self.trigger('close', {
+            originalEvent: evt,
+            data: data
+          });
         }
 
         return;