add support for sqlalchemy 2

Author: mfranczel

setup.py

@@ -21,7 +21,7 @@
     install_requires=[
         # requires sqlalchemy.sql.base.DialectKWArgs.dialect_options, new in
         # version 0.9.2
-        'SQLAlchemy>=0.9.2,<2.0.0',
+        'SQLAlchemy>=0.9.2,<3.0.0',
         'packaging',
     ],
     classifiers=[

sqlalchemy_redshift/dialect.py

@@ -1368,9 +1368,8 @@ def on_connect(self):
         fns = []
 
         def on_connect(conn):
-            from sqlalchemy import util
             from sqlalchemy.sql.elements import quoted_name
-            conn.py_types[quoted_name] = conn.py_types[util.text_type]
+            conn.py_types[quoted_name] = conn.py_types[str]
 
         fns.append(on_connect)