Merge pull request #111 Fix retryTransactions params

Author: rekby

src/Table.php

@@ -481,7 +481,7 @@ public function retrySession(Closure $userFunc, bool $idempotent = false, RetryP
 
     }
 
-    public function retryTransaction(Closure $userFunc, bool $idempotent = null, RetryParams $params = null, array $options){
+    public function retryTransaction(Closure $userFunc, bool $idempotent = null, RetryParams $params = null, array $options = []){
         if ($options == null) {
             $options = [];
         }