chore: fix more deprecation warnings

Author: charlesportwoodii-cb

src/Client.php

@@ -65,6 +65,8 @@ class Client
     private $authorizationMode;
 
     public $dataStore;
+    
+    public $yamlParser;
 
     /**
      * Create a new instance of Client.

src/ClientBuilder.php

@@ -83,6 +83,8 @@ class ClientBuilder
      */
     private $defaultFile = '.okta/okta.yaml';
 
+    public $dataStore;
+
     public $yamlParser;
 
     public function __construct($yamlParser = null, $defaultFilePath = null)