Merge pull request SortableJS#30 from raineorshine/patch-1

[README] Add data property in Getting Started example

Author: David-Desmaisons

README.md

@@ -91,6 +91,11 @@ npm i -S vuedraggable@next
         components: {
             draggable,
         },
+        data() {
+          return {
+            drag: false,
+          }
+        },
   ...
 ```