Clarify that sqlalchemy >=1.3 is required

Author: kurtmckee

setup.py

@@ -74,7 +74,7 @@ def get_version():
     include_package_data=True,
     platforms='any',
     install_requires=[
-        'SQLAlchemy>=1.0',
+        'SQLAlchemy>=1.3',
         "importlib_metadata ; python_version<'3.8'",
     ],
     extras_require=extras_require,