remove additional 0.01 change value when requesting unspents for use in txn creation

Summary: The platform already adds on 0.01 when requesting unspents, so this 0.01 is redundant

Reviewers: ben, mark

Reviewed By: mark

Subscribers: ben

Differential Revision: https://phabricator.bitgo.com/D6194

Author: Alex Melville

package.json

@@ -1,6 +1,6 @@
 {
   "name": "bitgo",
-  "version": "3.5.2",
+  "version": "3.6.0",
   "description": "BitGo Javascript SDK",
   "main": "./src/index.js",
   "keywords": [

src/transactionBuilder.js

@@ -263,9 +263,9 @@ exports.createTransaction = function(params) {
       return;
     }
 
-    // Get enough unspents for the requested amount, plus a little more in case we need to pay an increased fee
+    // Get enough unspents for the requested amount
     var options = {
-      target: totalAmount + 0.01e8,  // fee @ 0.0001/kb for a 100kb tx
+      target: totalAmount,
       minSize: params.minUnspentSize || 0,
       instant: params.instant, // insist on instant unspents only
       targetWalletUnspents: params.targetWalletUnspents