Replace deprecated method

Author: mdmintz

seleniumbase/masterqa/master_qa.py

@@ -128,7 +128,7 @@ def manual_page_check(self, *args):
     def wait_for_special_alert_absent(self, timeout=MAX_IDLE_TIME_BEFORE_QUIT):
         for x in range(int(timeout * 20)):
             try:
-                alert = self.driver.switch_to_alert()
+                alert = self.driver.switch_to.alert
                 dummy_variable = alert.text  # Raises exception if no alert
                 if "?" not in dummy_variable:
                     return