Transaction: toNumber/fromNumber to set satoshis

lib/transaction/output.js

@@ -38,7 +38,7 @@ Object.defineProperty(Output.prototype, 'satoshis', {
     if (num instanceof BN) {
       this._satoshis = num;
     } else {
-      this._satoshis = BN(num, 'hex');
+      this._satoshis = BN().fromNumber(num);
     }
   }
 });