[AIRFLOW-4332] Upgrade sqlalchemy to remove security Vulnerability (#5113)

setup.py

@@ -336,7 +336,7 @@ def do_setup():
             'python-dateutil>=2.3, <3',
             'requests>=2.20.0, <3',
             'setproctitle>=1.1.8, <2',
-            'sqlalchemy>=1.1.15, <1.3.0',
+            'sqlalchemy~=1.3',
             'tabulate>=0.7.5, <0.9',
             'tenacity==4.12.0',
             'text-unidecode==1.2',