add array comprehension and property name shorthand

lib/6to5/transform.js

@@ -95,6 +95,8 @@ transform.test = function (actual, expect, opts) {
 };
 
 transform.transformers = {
+  propertyNameShorthand:    require("./transformers/property-name-shorthand"),
+  arrayComprehension:       require("./transformers/array-comprehension"),
   arrowFunctions:           require("./transformers/arrow-functions"),
   classes:                  require("./transformers/classes"),
   spread:                   require("./transformers/spread"),