input: Write a python function to get the BIP9 status from blockchain info.
  assert get_bip9_status(node, 'csv') == 'defined'
  assert get_bip9_status(node, 'segwit') == 'started'
  assert get_bip9_status(node, 'taproot') == 'locked_in'
output: def get_bip9_status(node, bip_name):
      return node.getblockchaininfo()['bip9_softforks'][bip_name]['status']