Merge pull request #4 from Ennexa/JoyceBabu-patch-1

fix: add public method getCache. Fixes #3

src/Update.php

@@ -125,7 +125,7 @@ private static function base64encode($string)
      *
      * @return string
      */
-    private function getCaches()
+    public function getCache()
     {
         if (is_null($this->cacheList)) {
             $response = $this->guzzleClient->get('https://cdn.ampproject.org/caches.json');