message: feat: update testnet node URL
diff: @@ -84,7 +84,7 @@ export class StacksMainnet implements StacksNetwork {
  export class StacksTestnet extends StacksMainnet implements StacksNetwork {
  version = TransactionVersion.Testnet;
  chainId = ChainID.Testnet;
  - coreApiUrl = 'http://testnet-master.blockstack.org:20443';
  + coreApiUrl = 'http://stacks-node-api.blockstack.org';
  }
  export class StacksMocknet extends StacksMainnet implements StacksNetwork {
  