add transaction builder test to browser

test/index.html

@@ -35,6 +35,7 @@
     <script src="test.SIN.js"></script>
     <script src="test.SINKey.js"></script>
     <script src="test.Transaction.js"></script>
+    <script src="test.TransactionBuilder.js"></script>
     <script src="test.util.js"></script>
     <script src="test.VersionedData.js"></script>
     <script src="test.Wallet.js"></script>