feat: Added methods to enforcer for adding, removing and updating policies without usage of adapter (even if autoSave is true)#505

yiev wants to merge 2 commits intocasbin:mastercasbin/node-casbin:masterfrom

yiev:pr-add-del-update-without-adapter-usageyiev/node-casbin:pr-add-del-update-without-adapter-usageCopy head branch name to clipboard