By Karen Brettell NEW YORK (Reuters) – The dollar hit a 20-year high against rivals on Thursday as the Bank of Japan doubled-down on its dovish policy, sending the yen to its weakest level since 2002, while the euro hit a five-year low on growth concerns for the region. The dollar shot past the key level of 130 yen after the BOJ strengthened its commitment to keep interest rates ultra-low by vowing to buy unlimited amounts of bonds daily to defend its yield target. “The BoJ gave the ‘all clear’ to continue selling the yen,” said Lee Hardman, a currency analyst at MUFG Bank in London. There had…