WASHINGTON — Congress gave final approval Monday to legislation that for the first time would make lynching a federal hate crime in the U.S.. sending the bill to President Joe Biden to sign into law.Years in the making, the Emmett Till Anti-Lynching Act is among some 200 bills that have been introduced over the past century that have tried to ban lynching in America.It is named for the Black teenager whose brutal killing in Mississippi in 1955 — and his mother’s insistence on a open funeral casket to show …