Fix typing

Author: treysp

tests/dialects/test_dialect.py

@@ -28,9 +28,9 @@ def assert_duckdb_sql(
         self,
         expression: exp.Expression,
         *,
-        includes: t.Iterable[str] | None = None,
-        excludes: t.Iterable[str] | None = None,
-        chr_chars: t.Iterable[str] | None = None,
+        includes: t.Optional[t.Iterable[str]] = None,
+        excludes: t.Optional[t.Iterable[str]] = None,
+        chr_chars: t.Optional[t.Iterable[str]] = None,
     ) -> str:
         duckdb_sql = expression.sql("duckdb")