Update json-patch-duplex.js
Update json-patch-duplex.js

exposing the compare method.
MGDIS/JSON-Patch,Starcounter-Jack/JSON-Patch,MGDIS/JSON-Patch,MGDIS/JSON-Patch,Starcounter-Jack/JSON-Patch,ortoo/JSON-Patch,MGDIS/JSON-Patch,baranga/JSON-Patch,ortoo/JSON-Patch,Starcounter-Jack/JSON-Patch,baranga/JSON-Patch,baranga/JSON-Patch,ortoo/JSON-Patch,ortoo/JSON-Patch,Starcounter-Jack/JSON-Patch,baranga/JSON-Patch