Fix RemoveIn20 warning: use engine.begin for explicit transaction

test/unit/data/model/test_views.py

@@ -82,7 +82,7 @@ def make_table(metadata):
 
 def run_view_test(url, metadata, view, query):
     with sqlalchemy_engine(url) as engine:
-        with engine.connect() as conn:
+        with engine.begin() as conn:
             metadata.create_all(conn)  # create table in database
             conn.execute(CreateView(view.name, view.__view__))  # create view in database
             result = conn.execute(query).fetchall()