Improve sql.roles typings

Author: bryanforbes

sqlalchemy-stubs/sql/roles.pyi

@@ -1,4 +1,4 @@
-from .. import util as util
+from typing import Any
 
 class SQLRole:
     allows_lambda: bool = ...
@@ -40,7 +40,7 @@ class StatementRole(CoerceTextStatementRole): ...
 class ReturnsRowsRole(StatementRole): ...
 
 class SelectStatementRole(ReturnsRowsRole):
-    def subquery(self) -> None: ...
+    def subquery(self) -> Any: ...
 
 class HasCTERole(ReturnsRowsRole): ...
 class CompoundElementRole(AllowsLambdaRole, SQLRole): ...