SINGAPORE (Reuters) - Singaporean ride-hailing firm Grab has invested in London-based startup Splyt Technologies and extended a partnership between the two companies that will expand the reach of Grab's services beyond Southeast Asia.Splyt's technology will allow Grab users travelling outside the region to be able to book rides through the Grab app, and have them fulfilled by Splyt's partners without having to download another app, the companies said in a statement.The partnership is in line..