Update readme.md

readme.md

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 ## 15th March 2019 Update
-I just quickly added a new alternative approach by using Strategy pattern (composition) under DeliveryOrderModule/Strategy folder. Strategy pattern is good to be used when the class needs to be fully decoupled and distributed to anywhere.
+I just quickly added a new alternative approach by using Strategy pattern under DeliveryOrderModule/Strategy folder. Strategy pattern is good to be used when the class needs to be fully decoupled and distributed to anywhere.
 
 Note: I haven't added test for Strategy pattern yet. Honestly, I still prefer Template method, all the duplicate code put into super class so that all subclass share those code. And the requirement clearly states each of delivery order has its own workflow which is a perfect usage to define steps in super class (AbstractDeliveryOrderProcessor)