fix: some warnings and possibile issues

Author: Marco Cesarato

dist/scanner

@@ -52,7 +52,7 @@ private function __clone()
      *
      * @return void
      */
-    private function __wakeup()
+    public function __wakeup()
     {
     }
 }

src/Abstracts/SingletonAbstract.php

@@ -202,7 +202,7 @@ public static function progress($done, $total, $size = 30)
         }
         $disp = number_format($perc * 100);
         $statusBar .= "] $disp%";
-        $rate = $done !== 0.0 ? ($now - $startTime) / $done : ($now - $startTime);
+        $rate = $done !== 0.0 ? ($now - $startTime) / max(1, $done) : ($now - $startTime);
         $left = $total - $done;
 
         $eta = round($rate * $left, 2);