#506 quickfix to revert to APScheduler==3.11.2 and tzlocal 5.4.3 to avoid original issue

Author: justb4

requirements.txt

@@ -23,4 +23,4 @@ WTForms==2.2.1
 APScheduler==3.11.2
 passlib==1.7.1
 Werkzeug==0.16.1
-tzlocal<3.0 # Fix based on https://github.com/Yelp/elastalert/issues/2968
+tzlocal # Fix based on https://github.com/Yelp/elastalert/issues/2968