Restored method for backward compatibility. Auto resolve none auth.

Author: stefanak-michal

src/Bolt.php

@@ -53,6 +53,11 @@ final class Bolt
      */
     private $version;
 
+    /**
+     * @var string
+     */
+    private $scheme = 'basic';
+
     /**
      * Print debug info
      * @var bool
@@ -102,6 +107,16 @@ public function setPackStreamVersion(int $version = 1): Bolt
         return $this;
     }
 
+    /**
+     * @deprecated Use Auth helper
+     * @param string $scheme
+     * @return Bolt
+     */
+    public function setScheme(string $scheme = 'basic'): Bolt
+    {
+        return $this;
+    }
+
     /**
      * Version is available after successful connection with init/hello message
      * @return float
@@ -198,7 +213,7 @@ public function init($userAgentOrExtra, string $user = '', string $password = ''
     {
         if (is_string($userAgentOrExtra)) {
             Auth::$userAgent = $userAgentOrExtra;
-            $userAgentOrExtra = Auth::basic($user, $password);
+            $userAgentOrExtra = empty($user) && empty($password) ? Auth::none() : Auth::basic($user, $password);
             if ($routing !== false)
                 $userAgentOrExtra['routing'] = $routing;
         }