Merge branch 'fix-error-handling' into 'master'

fix error handling

See merge request !34

package.json

 {
   "name": "@hiveio/dhive",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Hive blockchain RPC client library",
   "author": "hive-network",
   "license": "BSD-3-Clause",

src/helpers/broadcast.ts

@@ -356,7 +356,8 @@ export class BroadcastAPI {
     transaction: SignedTransaction
   ): Promise<TransactionConfirmation> {
     const trxId = cryptoUtils.generateTrxId(transaction)
-    return Object.assign({ id: trxId }, this.call('broadcast_transaction', [transaction]))
+    const result = await this.call('broadcast_transaction', [transaction])
+    return Object.assign({ id: trxId }, result)
   }
 
   /**