added ES6 import method to README

Author: mesqueeb

.verb.md

@@ -4,6 +4,8 @@ Sort an array by the given object property:
 
 ```js
 var arraySort = require('{%= name %}');
+// or for ES6 imports:
+import arraySort from 'array-sort'
 
 var arr = [{foo: 'y'}, {foo: 'z'}, {foo: 'x'}];
 arraySort(arr, 'foo');