Upgrade to ES 8.x; Queries throw errors explicitly + bug fix

Author: pdphilip

src/Connection.php

@@ -15,10 +15,10 @@
 class Connection extends BaseConnection
 {
 
-    protected Client $client;
-    protected string $index;
+    protected $client;
+    protected $index;
     protected $maxSize;
-    protected string $indexPrefix;
+    protected $indexPrefix;
 
 
     public function __construct(array $config)