phpstan fixes

Author: eiriksm

lib/Github/Exception/SsoRequiredException.php

@@ -7,15 +7,24 @@
  */
 class SsoRequiredException extends RuntimeException
 {
+    /** @var string */
     private $url;
 
+    /**
+     * @param string $url
+     * @param int $code
+     * @param \Throwable|null $previous
+     */
     public function __construct($url, $code = 0, $previous = null)
     {
         $this->url = $url;
 
         parent::__construct('Resource protected by organization SAML enforcement. You must grant your personal token access to this organization.', $code, $previous);
     }
 
+    /**
+     * @return string
+     */
     public function getUrl()
     {
         return $this->url;