message: fix(ltc): update block explorer link for ltc
  Ticket:
diff: @@ -328,7 +328,7 @@ class Litecoin extends Mainnet implements UtxoNetwork {
  name = 'Litecoin';
  family = CoinFamily.LTC;
  utxolibName = 'litecoin';
  - explorerUrl = 'https://live.blockcypher.com/ltc/tx/';
  + explorerUrl = 'https://blockchair.com/litecoin/transaction/';
  }
  class LitecoinTestnet extends Testnet implements UtxoNetwork {
  