message: Update bitcoin explorer
diff: @@ -109,13 +109,13 @@ class AlgorandTestnet extends Testnet implements AccountNetwork {
  class Bitcoin extends BitcoinLikeMainnet {
  family = CoinFamily.BTC;
  - explorerUrl = 'https://smartbit.com.au/tx/';
  + explorerUrl = 'https://blockstream.info/tx/';
  bech32 = 'bc';
  }
  class BitcoinTestnet extends BitcoinLikeTestnet {
  family = CoinFamily.BTC;
  - explorerUrl = 'https://testnet.smartbit.com.au/tx/';
  + explorerUrl = 'https://blockstream.info/testnet/tx/';
  bech32 = 'tb';
  }
  