message: fix(express): log bitgo-express and bitgojs versions on error
  Log keys `bitgoJsVersion` and `bitgoExpressVersion` on error. This
  makes it easier to identify where an error originates (WP or SDK).
  Issue:
diff: @@ -745,8 +745,11 @@ function promiseWrapper(promiseRequestHandler: Function) {
  const message = err.message || 'local error';
  // use attached result, or make one
  let result = err.result || { error: message };
  - result = _.extend({}, result);
  - result.message = err.message;
  + result = _.extend({}, result, {
  + message: err.message,
  + bitgoJsVersion: version,
  + bitgoExpressVersion: pjson.version,
  + });
  const status = err.status || 500;
  if (!(status >= 200 && status < 300)) {
  console.log('error %s: %s', status, err.message);
  