LONDON (Reuters) – Britain’s Prime Minister Boris Johnson said on Saturday that if Western nations fail to live up to their promises to support Ukraine’s independence, that would have damaging consequences worldwide, including for Taiwan. “Every time that Western ministers have visited Kiev, we have assured the people of Ukraine and their leaders that we stand four-square behind their sovereignty and independence,” Johnson told a security conference in Munich. “If Ukraine is endangered, the shock will echo around the world. And those echoes will be heard in east Asia, will be heard in Taiwan,”…