[JES] Try and examine the error message to see if it's an actual error or not....

[JES] Try and examine the error message to see if it's an actual error or not. If not, return an empty string

package.json

 {
   "name": "@hiveio/hive-js",
-  "version": "2.0.2",
+  "version": "2.0.4",
   "description": "Hive.js the JavaScript API for Hive blockchain",
   "main": "lib/index.js",
   "scripts": {