Uber Technologies Inc.’s rivals are stepping up the battle for ride-sharing dominance in Europe, with local startups raising funds and global adversaries increasing contact with local regulators as they seek to gain a toehold in the region. Taxify OU is looking to raise $50 million in the first quarter to fund expansion plans, according to a person familiar with the matter. The move comes after the Estonia-based startup revealed in October that it received backing from Chine