By Ankur Banerjee SINGAPORE (Reuters) – The U.S. dollar was firmly higher against major currencies on Monday, while China’s yuan slipped as sentiment was soured by rising COVID cases and tightening restrictions in some cities in the world’s second-biggest economy. China’s capital Beijing reported two deaths for Nov. 20, with the city’s most populous district urging residents to stay at home on Monday, extending a request from the weekend as the country fights numerous COVID-19 flare ups. The rising cases and the new deaths have cast doubt on the hopes of an early easing in strict pandemic rest…