Lyft is about to enter the increasingly competitive world of robotaxis.The ride-hailing company said Friday that users will be able to take rides in self-driving cars starting this summer, with autonomous vehicles first hitting the streets of Atlanta.The rollout will be done in partnership with May Mobility, an autonomous vehicle company. Its  self-driving technology will be installed in Toyota Sienna minivans that users will have the chance to take rides in.A Lyft spokesperson added that the co...