message: chore(account-lib): support bsc tx builder
diff: @@ -96,6 +96,8 @@ const coinBuilderMap = {
  tcelo: Celo.TransactionBuilder,
  avaxc: AvaxC.TransactionBuilder,
  tavaxc: AvaxC.TransactionBuilder,
  + bsc: Bsc.TransactionBuilder,
  + tbsc: Bsc.TransactionBuilder,
  avaxp: AvaxP.TransactionBuilderFactory,
  tavaxp: AvaxP.TransactionBuilderFactory,
  hbar: Hbar.TransactionBuilderFactory,
  