Added proptypes and an optional breadcrumbName for last property
Added proptypes and an optional breadcrumbName for last property

svenanders/react-breadcrumbs,derekyau/react-breadcrumbs,licyeus/react-breadcrumbs,derekyau/react-breadcrumbs,svenanders/react-breadcrumbs,derekyau/react-breadcrumbs,licyeus/react-breadcrumbs,zeinds/react-breadcrumbs,Nic128/react-breadcrumbs,zeinds/react-breadcrumbs,Nic128/react-breadcrumbs