fix(Extract): make Extract::suffixExists protected (#35)

fix(Extract): make Extract::suffixExists protected

Author: Gman98ish

src/Extract.php

@@ -359,7 +359,7 @@ private function parseSuffix($hostname)
      *
      * @return bool
      */
-    private function suffixExists($entry)
+    protected function suffixExists($entry)
     {
         if (!$this->suffixStore->isExists($entry)) {
             return false;