message: refactor(statics): change trx test network from nile to shasta
  Currently statics has Nile info instead Shasta testnet, we need Shasta explorer info to use it on
  TAT on links
  stlx-2264
diff: @@ -350,7 +350,7 @@ class Trx extends Mainnet implements AccountNetwork {
  class TrxTestnet extends Testnet implements AccountNetwork {
  family = CoinFamily.TRX;
  - explorerUrl = 'https://nile.tronscan.org/#/transaction/';
  + explorerUrl = 'https://shasta.tronscan.org/#/transaction/';
  }
  class Xrp extends Mainnet implements AccountNetwork {
  