MOSCOW (Reuters) – After launching a digital rouble early next year, Russia plans to use the currency in mutual settlements with China as it seeks to reduce Washington’s global financial hegemony, a senior Russian lawmaker said on Monday. Russia, like many countries, has been developing digital money over the last couple of years to modernise its financial system, speed up payments and head off the threat of cryptocurrencies like bitcoin gaining influence. The central bank is already conducting digital rouble tests with banks at a time when sanctions against Moscow over its actions in Ukraine …